This time i have new bug in my new acount .. When i took my pokemon back from the daycare and went out the daycare house this massege appears to me
http://prntscr.com/354glvSo ye the bug seem to be with the daycare but i dont know what . Cause in my old acount i got bug of "cannot convert nil into string" also was after using the daycare
Edit: After i took the other pokemon from the daycare back . game worked fine and i went out the daycare house building normally.
Then i Tested and sent back a pokemon to the daycare again then went out . still working normally.
Conclusion: Maybe when u leave 2 pokes , then u take 1 back and leave 1 in the daycare this proplem occurs & u should take the 2 pokes back to avoid the proplem from happening.
Now everything is fine & i can play.
But will leave this post For admins to solve