3rd Party: TikTok Connection Syncs Failing With Internal Timeout or Internal Connection Error With 5xxxx Error Code
Incident
Report for Fivetran
Resolved
This incident has been resolved. We have observed that instance rates are returning to normal levels, and affected connectors are syncing successfully.
Incident Summary
Description:
We identified an issue affecting the TikTok Ads connector, which caused syncs to fail with the error:
“Received unknown error with return code -99999. Error: \"Internal Timeout.\"
Timeline:
This issue began on 25 January 2026 at 10:04 AM UTC and was resolved on 26 January 2026 at 05:52 AM UTC.
Cause:
The failure was triggered on the "Pixel Stats" endpoint, where the TikTok Ads service began returning HTTP 500 errors.
Resolution:
We implemented a skip mechanism on the affected endpoint by displaying a warning message in the dashboard, and the connectors continue the sync for the remaining data.
Incident Summary
Description:
We identified an issue affecting the TikTok Ads connector, which caused syncs to fail with the error:
“Received unknown error with return code -99999. Error: \"Internal Timeout.\"
Timeline:
This issue began on 25 January 2026 at 10:04 AM UTC and was resolved on 26 January 2026 at 05:52 AM UTC.
Cause:
The failure was triggered on the "Pixel Stats" endpoint, where the TikTok Ads service began returning HTTP 500 errors.
Resolution:
We implemented a skip mechanism on the affected endpoint by displaying a warning message in the dashboard, and the connectors continue the sync for the remaining data.
Monitoring
Third-party has resolved the issue and syncs are now recovering. We are continuing to monitor the syncs.
Investigating
We are seeing that some TikTok Ads connections are still encountering errors (52300, 51010). Our team is actively investigating the issue and is also coordinating with TikTok Ads while we wait for further updates from their side.
Monitoring
A fix has been implemented and we are monitoring the results.
Identified
We have identified an issue with the TikTok Ads connection, where sync jobs are failing due to internal timeouts or connection errors. This appears to have originated from the third-party side; as a result, we have reached out to TikTok Support and are working with them to resolve it.
This incident affected: Marketing connectors (Tiktok Ads).