Yes, intermittent access errors like the one in your screenshot are occasionally seen in Microsoft Power Apps model-driven apps, especially in the Microsoft Dataverse environments hosted in Europe regions.
Your error shows:
Error Code: -2147015417
UciError: 502
Web server received an invalid response while acting as a gateway or proxy
AppContextLoader: 502
This indicates a temporary gateway/proxy issue between the client and the Power Apps content service, not usually a configuration issue in your environment.
What the Error Means
The 502 error typically happens when:
- The Power Apps CDN (content.powerapps.com) temporarily returns an invalid response.
- There is latency or routing issues between the user and Microsoft edge nodes.
- The UCI (Unified Client Interface) scripts fail to load completely.
Since the scripts are served from:
content.powerapps.com/resource/uci-infra-web
any transient issue there can cause the model-driven app to fail to load.
Common Causes
Temporary Microsoft Service Issues
Occasionally seen during regional infrastructure incidents in European Dataverse clusters.
Check status on:
- Microsoft 365 Service Health Dashboard.
Look for incidents related to:
- Power Apps
- Dataverse
- Dynamics 365
CDN / Network Routing Problems
If users are in different locations, some may hit a problematic CDN edge node.
Typical symptoms:
- Works for some users
- Fails randomly
- Works after refresh
Browser Cache Issues
Corrupted cached UCI scripts can cause intermittent failures.
Fix:
or
