Pimcore 5.x fail login after upgrade php from 7.1 to 7.2

Hi all,

my pimcore 5.x work well with php 7.1. Now i upgrade php to v7.2 then i cannot login to admin page (always redirect ti admin login page). I tried with pimcore 6.x then get the same issue (cannot login). Do i miss any library ?

Thanks for your help.

Any related info in your php log file?