when testing Sitefinity Quantum application :
open dashboard,go to http://localhost:60876/Sitefinity/Administration/add-ons
open WebAgency , status " Inactive"
when try to activation an error appera :
(This add-on has not been activated successfully. Please check the log for further information )
if i try again , a new error
This add-on cannot be activated, because its files are missing or corrupted
how to fix this issue ?