Mutiple users, our test systems from Mac and Windows are failing when installing extensions from the Adobe Exchange extension.
Install Extension from Adobe Exchange Panel in Adobe CC application, Ps, Ai, Id,…
click to download extension
installing
ask to open Extension Manger CC, choose yes
Extension Manager CC
Asked to quit Adobe CC application
Sometimes: in Adobe CC application Panel shows "Installation failed. Please close Extension Manager and try again."
Quit Adobe CC application, click Retry
Extension Manager error - "File cannot be found... Extension will not be installed."
Result: Installed extension not shown installed in Extension Manager or Adobe Exchange Panel, but extension is installed.
Attempting to reinstall has same failure. Extension is installed, but has no method to remove.
Note installing steps in Panel and in Extension Manager can last 5+ minutes.