This looks a lot like: https://forum.mendix.com/link/questions/113802, so I’ll copy the findings here:
Could you do the following:
Go to your Mendix\<version>\modeler folder, then find the studiopro.exe.nlog file, and then change the minlevel to "Trace" (or "Debug").
Afterward, you would need to reproduce the issue again (so: run the app again) to get all the logs.
Possibly, you’ll find logs like:
<!-- 0 0 174 0 1649078789 4 http://127.0.0.1:9090/ --> ---> System.Net.WebException: The remote server returned an error: (403) Forbidden. at System.Net.HttpWebRequest.GetResponse()
If so, the issue is that Studio Pro uses the proxy to call 127.0.0.1. To handle it, just add or update the environment variable NO_PROXY to add 127.0.0.1, after it should work.
If not, could you please share the logs here?