Keeps loging out when any menu option clicked


I can login but as soon as I click on any link it logs me out and I have to login again.
Deleted installation and reinstall fresh copy again but same problem?

switch of password required, and now get error
"You have been logged out, because the session token of your request was incorrect"

Similar error as previous post .

Any help wil be appreciated

Update… For what it is worth… I contacted my hosting supplier and there was an auto update on PHP… Rolled back to previous PHP version and now working perfectly… Hope This helps somebody else.