Hi, I'm trying to migrate an installation of Ignition 7.9 to Ignition 8.3, when I migrate first to 8.1 everything looks good, but when I try to migrate to 8.3 It didn't work specifically in the login. The original application have a User Sources in MYSQL database and It is configure in Manual Mode. I don't know if in Ignition 8.3 this options did't works.
I believe the Database Authentication User Source remains unchanged in 8.3. It would be beneficial to reset the password on the 8.3 gateway and manually investigate why the new user source is not functioning correctly, if you haven't already. Gateway Command-line Utility - gwcmd | Ignition User Manual
The 8.3 upgrade guide does mention changes to gateway security, with some settings not porting over from 8.1 and requiring manual intervention.