Le-Ko — PostHog error health snapshot

Focus: what errors got worse, where they happen, and what blocks app usage

Current period: 19 Jun – 25 Jun 2026 · Comparison: 12 Jun – 18 Jun 2026
Report generated: 26 June 2026 · Source: PostHog Error Tracking ($exception + onboarding events)

Executive summary PostHog Error Tracking

250
Total exceptions
-7.4% vs prior week
26
Users affected
+13.0% vs prior week
51
Distinct issues
-10.5% vs prior week

Overall volume improved vs prior week

Exceptions fell from 270 to 250 (-7.4%). Users affected: 23 → 26. Prior week spike on 2026-06-16 (138 events) was mostly onboarding validation noise.

Breaking errors this week (specific)

Login / OTP (not the same as SMS failure)

Error overview Volume & source

Daily exceptions (Day 1–7 aligned)

This week peaked on Day 2 (108 exceptions on 2026-06-22).

Exceptions by SDK / source

SourceThis weekUsersPrior weekUsers
Mobile (posthog-react-native)2502627023
Backend (posthog-node)————

Most common errors By issue

Where errors happen

Most problems fall into a few buckets: phone lost connection, events list could not load, signup validation (text too long, bad nickname), and background server checks that rarely affect real users. Same user-facing error on iPhone and Android is shown as one row. Use the Context column for what happened and how to debug.

Top issues this week (by occurrences)

ErrorContextBreaking?OccurrencesUsersPrior occ.Prior usersArea
Phone could not reach our servers

Usually happens on poor signal, airplane mode, or when the API host is unreachable. Any screen waiting on network data can hang or show empty state.

Technical details
Label: Network request failed (mobile) (merged 4 PostHog issues)
Exception: TypeError · Network request failed
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019eef9c-17fe-7dd0-87d3-8212e197d3e6, 019ef9a5-b173-7571-8b8b-fec1b0d5cf0d (+2 more)
Merged fingerprints: 4
Debug hint: Mobile TypeError/Error: Network request failed. Check API base URL, TLS, timeouts, and CDN/proxy health.
App-blocking88421connectivity
Background lookup failed (low user impact)

Almost all hits come from one backend actor (polling/integration), not thousands of real users. Safe to deprioritize unless user count spikes.

Technical details
Label: Resource NOT_FOUND (backend) (merged 3 PostHog issues)
Exception: Error · NOT_FOUND
SDK: posthog-react-native
App version: 3.6.0, 3.8.0
PostHog issue: 019eeeae-dcce-75e2-9a9a-d83fd5655231, 019edf1b-159e-7e43-9692-0702abf71921 (+1 more)
Merged fingerprints: 3
Debug hint: posthog-node capture with value NOT_FOUND. Find captureException('NOT_FOUND') in backend; likely id lookup miss.
Noise / low impact573——backend API
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: iOS.

Technical details
Label: Error: [{"_id":"getCoachExplorerFilter","baseUrl":"https://backend.staging.le-ko.ru","… (merged 2 PostHog issues)
Exception: Error · [{"_id":"getCoachExplorerFilter","baseUrl":"https://backend.staging.le-ko.ru","query":{"eligibility":"all","format":"offline","latitude":39.471566,"locale":"en","longitude":-0.369738,"maxDistance":25…
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019ee00f-a4a2-75b0-8218-2d03a99005d5, 019edfeb-e48f-7fd3-acd6-79fc279e3180
Merged fingerprints: 2
Notes: [{"_id":"getCoachExplorerFilter","baseUrl":"https://backend.staging.le-ko.ru","query":{"eligibility":"all","format":"offline","latitude":39.471566,"locale":"en…
Degraded only323154mobile app
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: Android, iOS.

Technical details
Label: Error: {"message":"Request failed with status code 500","data":{"message":"Request fai… (merged 2 PostHog issues)
Exception: Error · {"message":"Request failed with status code 500","data":{"message":"Request failed with status code 500","name":"AxiosError","stack":"Error at settle (/app/node_modules/axios/lib/core/settle.js:19:16…
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019ee012-ed00-7961-b3dc-d265a51ceb6f, 019eff5c-8593-7201-aeb9-a8e3f57b8785
Merged fingerprints: 2
Notes: {"message":"Request failed with status code 500","data":{"message":"Request failed with status code 500","name":"AxiosError","stack":"Error at settle (/app/nod…
Degraded only104——mobile app
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: Android, iOS.

Technical details
Label: TypeError: undefined is not a function (merged 3 PostHog issues)
Exception: TypeError · undefined is not a function
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019ef511-878d-7143-b4ba-0f17eefcb52b, 019ef516-5187-7b53-a21a-8a593288bec8 (+1 more)
Merged fingerprints: 3
Notes: undefined is not a function
Degraded only93214mobile app
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: Android, iOS.

Technical details
Label: TimeoutError: API request timed out after 30000ms (merged 2 PostHog issues)
Exception: TimeoutError · API request timed out after 30000ms
SDK: posthog-react-native
App version: 3.8.0, 4.0.0
PostHog issue: 019efe40-8eab-70e0-b081-e61737b2c36f, 019efe98-6a59-7891-b0ec-a25b65871508
Merged fingerprints: 2
Notes: API request timed out after 30000ms
Degraded only53——mobile app
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: iOS.

Technical details
Label: Error: Client has encountered a connection error and is not queryable
Exception: Error · Client has encountered a connection error and is not queryable
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019edf22-1055-7750-be81-44366a53ea8b
Notes: Client has encountered a connection error and is not queryable
Degraded only42——mobile app
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: Android.

Technical details
Label: Error: {"message":"Request failed with status code 404","data":{"errors":[{"code":"not…
Exception: Error · {"message":"Request failed with status code 404","data":{"errors":[{"code":"notFound","endpoint":"/workouts/e77e914f-43ac-448e-8684-4d2234b3be82","message":"workout not found","requestId":"leko-booki…
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019ef396-0f7d-77c0-90b3-5a2b43517a86
Notes: {"message":"Request failed with status code 404","data":{"errors":[{"code":"notFound","endpoint":"/workouts/e77e914f-43ac-448e-8684-4d2234b3be82","message":"wo…
Degraded only31——mobile app
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: iOS.

Technical details
Label: Error: [{"_id":"getWorkoutsExplore","baseUrl":"https://backend.staging.le-ko.ru","quer…
Exception: Error · [{"_id":"getWorkoutsExplore","baseUrl":"https://backend.staging.le-ko.ru","query":{"eligibility":"All","latitude":39.466539,"locale":"en","longitude":-0.359928,"maxDistanceInMeters":25000}}] data is …
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019edfb3-a900-7d93-803f-4a74ae60718b
Notes: [{"_id":"getWorkoutsExplore","baseUrl":"https://backend.staging.le-ko.ru","query":{"eligibility":"All","latitude":39.466539,"locale":"en","longitude":-0.359928…
Degraded only31——mobile app
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: Android.

Technical details
Label: Error: Неправильный код. Запросите новый код или попробуйте снова
Exception: Error · Неправильный код. Запросите новый код или попробуйте снова
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019edfd3-1e41-7e31-8a38-1364796063d6
Notes: Неправильный код. Запросите новый код или попробуйте снова
Degraded only3121mobile app
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: Android, iOS.

Technical details
Label: TypeError: Cannot read property 'userId' of null (merged 2 PostHog issues)
Exception: TypeError · Cannot read property 'userId' of null
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019ee016-8b32-7553-94d1-d88b145dcc9c, 019ee05d-e26f-72f1-92fc-ed888b7c55c8
Merged fingerprints: 2
Notes: Cannot read property 'userId' of null
Degraded only3211mobile app
Something went wrong in the app

An error was logged. See technical label below for engineers. Device: Android.

Technical details
Label: Error: {"message":"User is not a member of this group","data":{"errors":[{"code":"user…
Exception: Error · {"message":"User is not a member of this group","data":{"errors":[{"code":"user_not_member","endpoint":"","message":"User is not a member of this group","requestId":""}]},"status":403}
SDK: posthog-react-native
App version: 4.0.0
PostHog issue: 019f005d-d1e7-7600-ac4e-a8f3f0eb3a50
Notes: {"message":"User is not a member of this group","data":{"errors":[{"code":"user_not_member","endpoint":"","message":"User is not a member of this group","reque…
Degraded only21——mobile app

Critical errors App- & feature-blocking · week-over-week

App/feature-blocking issues: this week vs prior week

Onboarding & login errors Signup & setup path

1
Onboarding exceptions
-80.0% vs prior week
9
LoginOtpFailed (wrong code)
-50.0% vs prior week
2
SMS send failures
+100.0% vs prior week

Wrong code ≠ SMS not delivered

When someone enters a bad verification code, they see: “The code is not correct. Please request another code or try again.” The text message already arrived — they can retry. This is not the same as failing to send the SMS.

SMS could not be sent — true login blocker

2 users hit “Could not send the verification code” this week. They cannot move past phone entry until send works. Watch this number closely.

About text too long blocks one signup step

Users who write more than 500 characters in About must shorten their bio before continuing. Annoying but fixable — the rest of the app still works.

Step Events
This week		 Users
This week		 Events
Prior week		 Users
Prior week
SMS code requested
User asked us to send a verification text.		137476930
Verification code entered
User typed a code and tapped submit (includes retries).		112477130
Login succeeded
Code was accepted and login completed.		103454926
Wrong or expired code
Code rejected — SMS was sent; user can try again.		97189

How to read these numbers

  • Events ≠ users. One person retrying a bad code many times creates many failure events. This week: 9 failures from 7 users. Prior week: 18 failures from 9 users.
  • User-level impact: only 30.0% of people who requested an SMS in the prior week (9 of 30) had at least one wrong-code failure. This week: 14.9% (7 of 47).
  • Submits > requests is normal — users often submit several times before getting it right.
  • Prior-week spike: 15 wrong-code events on 2026-06-18 from only 7 users — likely heavy retries or testing, not a mass login outage.
  • Wrong-code failures are not SMS delivery failures. See SMS send failures below for true blockers.

LoginOtpFailed reasons (this week)

Error message shown to userCountUsers
Неправильный код. Запросите новый код или попробуйте снова
Shown in app: Неправильный код. Запросите новый код или попробуйте снова		42
Wrong or expired code — user can try again or request a new SMS
Shown in app: The code is not correct. Please request another code or try again.		22
O código não está correto. Solicite outro código ou tente novamente.
Shown in app: O código não está correto. Solicite outro código ou tente novamente.		22
Ocorreu um erro inesperado.
Shown in app: Ocorreu um erro inesperado.		11

SMS send failures (this week)

EventMessageCountUsers
ActionPhoneVerificationErrorWe couldn’t send the code right now. Please try again later.
Technical: We couldn’t send the code right now. Please try again later.		22

Onboarding-related exceptions this week

Onboarding exceptionContextBreaking?OccurrencesUsersPrior occ.Prior usersArea
Wrong verification code entered

User is on the phone verification screen. SMS was delivered; they typed a wrong or expired code and can retry.

Technical details
Label: OTP verification failed
Exception: Error · The code is not correct. Please request another code or try again.
SDK: posthog-react-native
App version: 3.8.0
PostHog issue: 019edf1a-fcb3-75b1-9ce7-1512aa322e70
Debug hint: LoginOtpFailed / exc_value: The code is not correct… — not ActionPhoneVerificationError.
Step-blocking1111login / OTP

Step-blocking only (user can fix & retry)

ErrorContextBreaking?OccurrencesUsersPrior occ.Prior usersArea
Wrong verification code entered

User is on the phone verification screen. SMS was delivered; they typed a wrong or expired code and can retry.

Technical details
Label: OTP verification failed
Exception: Error · The code is not correct. Please request another code or try again.
SDK: posthog-react-native
App version: 3.8.0
PostHog issue: 019edf1a-fcb3-75b1-9ce7-1512aa322e70
Debug hint: LoginOtpFailed / exc_value: The code is not correct… — not ActionPhoneVerificationError.
Step-blocking1111login / OTP