We have an ABP app built using the latest version of ABP - Angular for UI. When running the angular app locally against the .Host hosted in an Azure Web App everything works as it should. However, when pushing the Angular app to a Web App (not a static web app for reasons) everything works as well, except that we always get a "An error has occurred! Error detail not sent by server." at first page load. This regardless of which browser etc. This only happens on first full page load, after which everything works as it should.
There are no errors reported whatsoever in server logs, web browser console etc. If it had not been for this error message, you would have no idea that something isn't what it should be.
This happens regardless of if you are authenticated or now (authentication works fine also).
For obvious reasons we can't post any logs as there are none indicating any problem.
