RuntimeException: Unable to determine class for field type found in the configuration
One possible way is that your module is missing from the codebase or has been improperly uninstalled and you've still a field which is using that missing module.

Try the following drush/SQL commands to remove the broken field:

drush sqlq "DELETE FROM cache_config"
drush sqlq "DELETE FROM config WHERE name = 'field.storage.xxx.xxx' OR data LIKE '%field.storage.xxx.xxx%'"
drush sqlq "DELETE FROM config_snapshot  WHERE name = 'field.storage.xxx.xxx' OR data LIKE '%field.storage.xxx.xxx%'"


Warning: Don't execute above commands on master/live database. Make a backup before doing any database changes.

Where field.storage.xxx.xxx is your reported field storage type (e.g. field.storage.node.webform).

If above won't help, check for any other references by:

drush sql-dump --ordered-dump | grep field.storage.xxx.xxx


At the end you need to rebuild your caches:

drush cr