Adcopy search is not loading the search result in Edit Ads Page

When user search any keyword in Adcopy search box its, not loading the search result in Edit Ads Page

Steps:

1. Goto Edit Ads page
2. In Adcopy search box enter keyword

Actual Result: Adcopy search is not loading the search result it keeps loading

Expected Result: Adcopy search result should display searched keyword successfully.

Please check attached screenshot.