Selector validation error in assignment2 uipath advance course

HI team,
For UIpath advance course Assignment2,in workitems page, I have indicated a page to check next page available or not.Then i modified the selector according to the instruction.But selector in not validating now.Below is the error SS.

Please help!!!

Copy the string you’ve entered, and then delete and save the selector. Then reopen the Edit Selector window and paste it back in.

1 Like

Its working now.Thanks for the help.
Now I am facing timeout error while executing the dispatcher.Below is the error SS.
Please help.

Use UI explorer to analyze the element you expect to appear. Something is missing. If the selector UI explorer finds matches what your selector should be, it likely means that your transaction number is something not on the page, or it’s null.