Hello @Nikhil529 whenever you want to pass variable in selector follow below steps:
1.Click Selector field (highlighted area and not (…)):
2.Copy Selector and delete selector by pressing Cntrl + A and Cntrl + C to copy and Delete
key to delete selector
3. press Cntrl + S
4. Click on (…) and paste your selector and make modification for variables Note: make sure string we pass in selector is in single line (no newline etc.)