Membership 2 causes Internal server error

Dear support,

I am trying to create an membership program on my website, but the membership plugin causes an 500 internal server error. (see attachment)

I resolved and checked all the php extentions on the server in they where on.
First issue was fixed (curl extention was not active yet)

But the problem still continues..

It is even that bad that the option available for everyone is not working and still keeps blocking people that are not admin or member.. (looks like the communication with the database is broken or the ht-access?)

To check further if it is a server issue, i would like to know the configs of the php extentions needed for this plugin to work as well..

Please i hope you have an solution for it!

(i already deactived all plugins like is routine)