paul banks added a post in a topic: Convert 3.4.7 to 4
Some or all of the tables or columns in your database are not using a utf8 collation (ipb3backup_vars is latin1_swedish_ci). You must convert your database to UTF-8 in order to continue
You have 338 table(s) in this database that are not UTF-8. You must convert these tables to UTF-8 before you can proceed with the upgrade.
Try starting Converter every time says:
Error: COLLATION 'utf8_unicode_ci' is not valid for CHARACTER SET 'utf8mb4' File: /system/Db/Db.php Line: 186
I do not know more, can anybody help me?