I'm new to CiviCRM and am working for a client who's 4.7.x CiviCRM has issues where I'm unable to access tabs and I get an error when switching to some tabs in the menu system, so I'm trying to upgrade.
I've got 5.48.0 uploaded via FTP to the server. I've tarred the old version in the same directory so it doesn't conflict and I have a backup. (I also have backups in the backups panel in Siteground, so good there).
I deleted the old version, unpacked the new version, and deleted the cache files as instructed. When I go to click for the database upgrade, it fails.
I also no longer see all my data tables on the main Dashboard page, either.
Should I change the version of PHP before I try to run the database upgrade function?