Power Platform Community Forum Thread Details

We encountered issues while integrating PowerApps with a Custom Connector in both Test Mode and Studio Mode. Initially, we faced CORS problems while testing the custom connector response and when accessing the same API through the published APP URL.

To resolve these CORS issues, we referred to a couple of articles and successfully addressed the problem by adding the following URIs to the CORS policy:

https://flow.microsoft.com
https://apps.powerapps.com
After implementing the CORS policy changes it worked for almost 2 years without any issues. However, the custom connector stopped working in Test mode recently, although it still functions correctly within the app. Do we have any updates from MSFT w.r.t this?
Additionally, we continue to face challenges in loading data in PowerApps Studio mode. We attempted to resolve this by adding several URLs to the CORS policy based on our network tab debugging, but unfortunately, none of them have worked so far. Some of the URLs we tried are as follows:
- https://unitedstates.api.powerapps.com
- https://us.create.powerapps.com/
- https://unitedstates-002.azure-apim.net
  If any of you have encountered similar issues in the past and found successful resolutions, we would greatly appreciate your insights and tips to resolve these integration problems. Thank you in advance for your assistance!