after updating today successfully to latest version of 20 I also wanted to upgrade to 21.
After the upgrade via web gui failed with the same following message, I started occ with verbosity on debug.
2021-10-24T09:36:32+00:00 Setting log level to debug
2021-10-24T09:36:32+00:00 Repair step: Repair MySQL collation
2021-10-24T09:36:32+00:00 Repair info: All tables already have the correct collation → nothing to do
2021-10-24T09:36:32+00:00 Repair step: Repair SQLite autoincrement
2021-10-24T09:36:32+00:00 Repair step: Copy data from accounts table when migrating from ownCloud
2021-10-24T09:36:32+00:00 OC\DB\Exceptions\DbalException: Unknown column type “json_array” requested. Any Doctrine type that you use has to be registered with \Doctrine\DBAL\Types\Type::addType(). You can get a list of all the known types with \Doctrine\DBAL\Types\Type::getTypesMap(). If this error occurs during database introspection then you might have forgotten to register all database types for a Doctrine Type. Use AbstractPlatform#registerDoctrineTypeMapping() or have your custom types implement Type#getMappedDatabaseTypes(). If the type name is empty you might have a problem with the cache or forgot some mapping information.
2021-10-24T09:36:32+00:00 Update failed
2021-10-24T09:36:32+00:00 Maintenance mode is kept active
2021-10-24T09:36:32+00:00 Resetting log level
Any ideas or maybe there are others with the same problem? I am disabling apps one after the other atm.
Best and thanks,