autoit.autoit.AutoItError: Window/Control could not be found

[jasonyunjoonpark]

Not sure what I'm doing wrong. Code was working before. No changes were made.

[jasonyunjoonpark]

plus_btn.click()

Opens up the "Open" Window shown in the 2nd screenshot.

[StarvingEmma]

I have same issue over and over again. The only thing that "helps" is restarting or logging out of the system and back in. But after a while i get the same issue with Window/Control could not be found . But why this is keep happening if the code is working great? I can see the window opened in front of the browser and nothing else is running. Any information about this would be great.