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issue: ERROR Failed to send telemetry event ClientStartEvent #5747
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Originally created by @sanchitbhavsar on GitHub (Jul 12, 2025).
Check Existing Issues
Installation Method
Git Clone
Open WebUI Version
v0.6.15
Ollama Version (if applicable)
No response
Operating System
macOS
Browser (if applicable)
No response
Confirmation
README.md.Expected Behavior
App is not starting
Actual Behavior
ERROR [chromadb.telemetry.product.posthog] Failed to send telemetry event ClientStartEvent: capture() takes 1 positional argument but 3 were given
Steps to Reproduce
Using latest version with chromaDB
Logs & Screenshots
ERROR [chromadb.telemetry.product.posthog] Failed to send telemetry event ClientStartEvent: capture() takes 1 positional argument but 3 were given
Additional Information
No response
@rgaricano commented on GitHub (Jul 13, 2025):
It seems that the fault is in chromadb when passing arguments to a dependent library posthog (Requires-Dist: posthog>=2.4.0), for this to work properly, it need to change that requirement to force posthog>=2.4.0,<6.0.0
Maybe adding posthog>=2.4.0,<6.0.0 to requirements could solve that issue.
(https://github.com/vanna-ai/vanna/issues/917#issuecomment-3036668545 )
@sanchitbhavsar commented on GitHub (Jul 13, 2025):
@tjbck could you refer to the duplicate issue?
@rgaricano commented on GitHub (Jul 13, 2025):
https://github.com/open-webui/open-webui/issues/15652
https://github.com/open-webui/open-webui/issues/15613
@sanchitbhavsar commented on GitHub (Jul 14, 2025):
@rgaricano still fails even though the ANONYMIZED_TELEMETRY is set to false
@tjbck do you have some pointers?
@sanchitbhavsar commented on GitHub (Jul 15, 2025):
@tjbck @rgaricano adding explicitly the posthog lib in requirements.txt and in pyproject.toml resolved the error. I used posthog==4.8.0
@thlehmann-ionos commented on GitHub (Sep 26, 2025):
Note: although there is a
uv.lockfile, it is not used in the container image build process: https://github.com/open-webui/open-webui/blob/v0.6.31/Dockerfile#L128