The new release of phplist 3.3.0 adds a field to the message table, which means the Copy Campaign function of the Campaigns Plugin does not function correctly because it does not populate the new field.
To fix that problem there is a new release of the Common Plugin with changes necessary to work with phplist 3.3.0.
To use the Campaigns Plugin with phplist 3.3.0 you must upgrade Common Plugin to its latest version, 3.5.9. In particular do not use the Copy Campaign function until you have upgraded Common Plugin.