Thank you for testing! I have tested and checked all the time and disabled one 3rd party plugin after the other.
AcyMailing, JEvent, Eventlist, phpforum....
After the 5th (?) try now it runs!
But than is the next problem:
I have a (free) membership for all users:
exklusive, liftetime, unlimited, allow new subsriptions, allow registration, allow upgrade, public access and default.
New member could choose for a additional paid membership:
not exklusive, 10 or 50 Euro per period, 1 year, unlimited recurrings, publishd, allow new subscription, allow registration, allow upgrade
If a user choose this:
the free membership is unpaid
the priced membership is (of course) unpaid
When I edit this user profile there comes the message
'User with the same username or email already exists!!!'
But there is only one user with this username or email.
What could I do or what is wrong with the subsription?