Uncaught PHP Exception RuntimeException: "Unable to determine class for field type 'entity_reference_revisions' found in the 'field.storage.node.field_mt_content_collapses' configuration
This might indicate the database is not imported correctly. In that case, you could try to import it again. So, next time you see this message, before you look into more complex causes of this error, just try to import the database another time and see if that fixes the error.
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