You should probably ask the creator of the module to update it for Mendix 5. It looks like there are 2 problems. First it's calling addUserAction with a String instead of a class. Second and third it's calling an empty constructor of UserAction that no longer exists, it should pass context here. If you're not familiar with Java coding I wouldn't mess with it myself but it's not impossible to fix.
The Licencepoolmanager has now been updated for version 5. With the latest version of V5 the conversion process completes without problems.