Legacy apps are working fine . But if you try to try to Edit or create new UiPath Apps with expression language as VB , The app designer is not loading. It keeps saying Initializing App. The edge network trace says that there is error in loading UiPath.assembly.blazor
Please look into browser network trace to see what is getting blocked. Your internal security team would have to unblock domain/Module. HEre is the documentation from UiPath to what all needs to be allowed .