Multiple Regions - Maestro - Action Center task creation failing

Final update

## Customer impact Between September 14, 2026 at 12:45 UTC and September 16, 2026 at 17:30 UTC, a subset of customers experienced failures when Maestro processes attempted to create human-in-the-loop tasks in Action Center. The first customer report reached UiPath on September 16 at 12:24 UTC and an incident was declared at 14:37 UTC, so a number of process runs failed before the issue was formally identified. Affected process runs faulted at the human-in-the-loop step with the error "Invalid input for the HITL task" and no Action Center task was created. No tasks were lost or duplicated, and no data was corrupted. Process runs that had already passed the human-in-the-loop step were not affected. The impact was limited to a small subset of organizations, primarily in the United States, Canada, Australia, and India regions, whose Maestro processes met a specific condition: the process used an Action App and the app's folder path had no value at run time. Canada and Singapore received the change but had no affected process runs. _**Action for affected customers: process runs that failed during this window did not recover automatically. If you have process runs that faulted at a human

1. Postmortem · Oct 1, 02:44 UTC
   ## Customer impact Between September 14, 2026 at 12:45 UTC and September 16, 2026 at 17:30 UTC, a subset of customers experienced failures when Maestro processes attempted to create human-in-the-loop tasks in Action Center. The first customer report reached UiPath on September 16 at 12:24 UTC and an incident was declared at 14:37 UTC, so a number of process runs failed before the issue was formally identified. Affected process runs faulted at the human-in-the-loop step with the error "Invalid input for the HITL task" and no Action Center task was created. No tasks were lost or duplicated, and no data was corrupted. Process runs that had already passed the human-in-the-loop step were not affected. The impact was limited to a small subset of organizations, primarily in the United States, Canada, Australia, and India regions, whose Maestro processes met a specific condition: the process used an Action App and the app's folder path had no value at run time. Canada and Singapore received the change but had no affected process runs. _**Action for affected customers: process runs that failed during this window did not recover automatically. If you have process runs that faulted at a human-in-the-loop step between September 14 and September 16 and have not yet been retried, please retry them from Maestro or contact UiPath Support with the process instance IDs.**_ ## Root cause A recent Maestro service update added input validation to the human-in-the-loop task creation step. The chan
2. Resolved · Sep 16, 19:41 UTC
   The issue has been resolved
3. Monitoring · Sep 16, 18:56 UTC
   A fix has been deployed for the issue impacting Action Center task creation for Maestro, and we are monitoring closely. Impact: Users may still experience task creation failures while the mitigation takes effect. Next update: We are continuing to monitor system behavior.
4. Monitoring · Sep 16, 17:44 UTC
   A fix has been deployed for the issue impacting Action Center task creation for Maestro, and we are monitoring closely. Impact: Users may still experience task creation failures while the mitigation takes effect. Next update: We are continuing to monitor system behavior.
5. Identified · Sep 16, 16:30 UTC
   We have established a mitigation, which is being applied to all affected regions. We will provide an update once the mitigation is rolled out.
6. Identified · Sep 16, 15:32 UTC
   We have identified the cause of the outage impacting Action Center task creation for Maestro in multiple regions and are working on a fix. Impact: Users may continue to be unable to create Action Center tasks. Next update: We are preparing a mitigation which will restore the functionality, and will provide an update shortly.
7. Investigating · Sep 16, 15:24 UTC
   We are investigating reports of an outage impacting Action Center task creation for Maestro in the United States, Australia, Canada, Singapore, India, and Community regions. Impact: Users may be unable to create Action Center tasks. Next update: Our teams are working to understand the cause and scope and will share updates as available.