I made some reasearch and in new blank project it is working.
EDIT: OOOO MY GOD ! It wasnt working cuz i had ‘)’ in folder name where widget was. I just renamed the folder and it works fine.
Unreal couldnt not find the folder. I come up with solusion when i saw error log that was ->
LogLinker: Can’t find file ‘/Game/moje/obrazki_na_’
LogLinker: Can’t find file ‘/Game/moje/obrazki_na_’
LogLinker: Can’t find file ‘/Game/moje/obrazki_na_’
LogLinker: Can’t find file ‘/Game/moje/obrazki_na_’
LogLinker: Can’t find file ‘/Game/moje/obrazki_na_’
name just stopped on ‘)’