It seems that the problem is the slugs of the fields you have created in ACF include special characters, namely % signs.
That is not allowed in Types and is not expected, and Views cannot handle them as-is.
The developer says that he will update Views to be able to handle such field slugs in a future update, but that may come too late to help you.
The only alternative for now if you want to use your ACF fields with Views is to rename the slugs so that they only contain standard characters (e.g. numbers, letters, underscores, dashes).
I think the problem is that the data with the % character in the meta keys is still in the database.
When you try to add a new filter and load the non-Types fields, it scans the postmeta table and is breaking because it finds such keys there.
I just used phpMyAdmin to go into the postmeta table and delete that data, re-tested, and loading the non-Types fields worked fine.
Are you able to do the same? You would have to re-enter the data in question. Or you could update keys in the database directly to whatever you have changed them to in ACF.
I don't know if ACF has a tool/feature that if you change a custom field slug it can update the existing posts in the database to use the new slug.
