Resolved after 30 minutes, affecting Apps and Apps and 1 more, on July 31, 2026.
## Customer impact Between July 30, 2026 at 9:07 am UTC and July 31, 2026 at 8:13 am UTC, a subset of customers experienced degraded behavior in UiPath Apps authored from Studio Web. **Expressions in newly created apps failed to evaluate**, which could prevent those apps from working as expected. The impact affected a subset of**Studio Web customers in the Europe Region,**other regions, and services were not impacted. Existing deployed apps continued to work normally. ## Root cause The root cause was an internal software component update deployed the previous day. This update caused expression evaluation to fail for newly deployed UiPath Apps authored from Studio Web, producing an internal software error during expression processing. ## Detection The issue was detected through an automated alert for the Studio Web Apps service on July 31, 2026 at 7:29 am UTC. Customer impact was declared within two minutes of detection, initially assessed at multiple regions and after downgraded to only Community Region. ## Response At**7:32 am UTC**, the initial impact description was shared: expression evaluation was failing in Studio Web Apps, while older deployed apps continued to work. At **7:43 am UTC**, a public status update was posted noting that degraded performance was under investigation for UiPath Apps authored from Studio Web in multiple regions, later impact being downgraded to only Community Region. By **7:59 am UTC**, a corrective update to revert the software component change was prepared. At **8:00 am UTC**, the fix began rolling out to affected regions, and the incident was marked mitigated after 30 minutes and 36 seconds. At **8:13 am UTC**, the fix had been deployed across all affected regions, Apps performance had returned to normal, and the incident was marked resolved. ## Follow up - **Strengthen pre-production testing** so regressions are caught before reaching production. - **Enhance monitoring** to faster detect packaging/publishing issues that are resulted due to compiler.
Affected components
Update timeline
- identified Jul 31, 2026, 07:43 AM UTC
We are investigating degraded performance impacting UiPath Apps authored from Studio Web service in Multiple Regions. Our teams are working to identify the cause and we will share more details as the investigation progresses.
- monitoring Jul 31, 2026, 08:00 AM UTC
We have a mitigation available and are beginning to roll it out to affected regions. We will provide more updates as the mitigation takes effect.
- resolved Jul 31, 2026, 08:13 AM UTC
The mitigation has been deployed across all affected regions and Apps performance has returned to normal. The issue is resolved.
- postmortem Aug 28, 2026, 02:15 AM UTC
## Customer impact Between July 30, 2026 at 9:07 am UTC and July 31, 2026 at 8:13 am UTC, a subset of customers experienced degraded behavior in UiPath Apps authored from Studio Web. **Expressions in newly created apps failed to evaluate**, which could prevent those apps from working as expected. The impact affected a subset of**Studio Web customers in the Europe Region,**other regions, and services were not impacted. Existing deployed apps continued to work normally. ## Root cause The root cause was an internal software component update deployed the previous day. This update caused expression evaluation to fail for newly deployed UiPath Apps authored from Studio Web, producing an internal software error during expression processing. ## Detection The issue was detected through an automated alert for the Studio Web Apps service on July 31, 2026 at 7:29 am UTC. Customer impact was declared within two minutes of detection, initially assessed at multiple regions and after downgraded to only Community Region. ## Response At**7:32 am UTC**, the initial impact description was shared: expression evaluation was failing in Studio Web Apps, while older deployed apps continued to work. At **7:43 am UTC**, a public status update was posted noting that degraded performance was under investigation for UiPath Apps authored from Studio Web in multiple regions, later impact being downgraded to only Community Region. By **7:59 am UTC**, a corrective update to revert the software component change was prepared. At **8:00 am UTC**, the fix began rolling out to affected regions, and the incident was marked mitigated after 30 minutes and 36 seconds. At **8:13 am UTC**, the fix had been deployed across all affected regions, Apps performance had returned to normal, and the incident was marked resolved. ## Follow up - **Strengthen pre-production testing** so regressions are caught before reaching production. - **Enhance monitoring** to faster detect packaging/publishing issues that are resulted due to compiler.
Your product runs on more than UiPath
Add the vendors you depend on and get one message when any of them reports trouble. Free for 3 vendors, no card.
Amazon Web Services