There was a faulty version yml data.
Where it shown wrong version (0.1) which is wrong ofcourse.
I though i fixed it already but im not sure if i passed on here so i do it again.
beside that :
Note the plugin is not needed anymore for the upcoming parkmanager version : 4.4+ as it does no longer edit the prefix in vault.
however if you use any lower version of parkmanager as stated you can still use this!