I'm using your membership Pro plugin(220.127.116.11).
But,When I update 18.104.22.168 from 22.214.171.124, All of my users saw "protected contents" message at all of our contents.
Maybe, Update program has something wrong.
So,I used Debug-mode.
This is the debug message.
[19-Oct-2015 17:12:30] loading level -premium *<- this is my premium membership level I created.
[19-Oct-2015 17:12:30] Standard levels are loaded for current member.
[19-Oct-2015 17:12:30] Current member can not view current page
[19-Oct-2015 17:12:31] CRON: There are 1 expiring relationships
Do you have any idea?
I took a guess that my some membership DB-tables now have wrong data.
Maybe,126.96.36.199(old version) don't use those data,so works fine.
But 188.8.131.52 is using them. (ex wp_m_member_payments),
So All of my member are force to move visitor-level in spite of their real level(premium).