[Lazarus] IDE qt5 compile error

[support at uvviewsoft.com]

> 
> Error: /home/john1/lazarus/lcl/interfaces//qt5/qtobject.inc:42:
> undefined reference to 
> `QGuiApplication_setFallbackSessionManagementEnabled'

Do not use Lazarus 'latest', but return to the revision before THAT qt5 
patch.
My linux terminal shows me which revision I use now:

user at PC:~/lazarus$ git status
HEAD detached at 23b2324f9f


I used Git to return to that revision.
Alexey