Hi Archit,
Why client is blank here? Can you hit the url only till main.html and see if the issue still persists.
Can you also clear the server cache by running report /UI2/INVALIDATE_GLOBAL_CACHES in execution mode?
And also please make sure you ran all steps mentioned in below link for clearing the cache from server side and browser side as well
SAP Fiori - Cache Management: Clearing caches after applying patches
Hope this helps,
JC