NF:- Invoice Management not loading once we edit an generated invoice and click on Generate Invoice tab

Site - Codemap
Steps:-
1] Log onto Codmap site
2] Search and select For QA-CHMC-Azure company
3] Click on Invoice Management option from Reports menu in BenAdmin curtain
4] Edit any invoice template which has generated invoices
5] Now edit any generated invoice and try going back to generate invoice page

Actual Result:
System is just showing the loader loading but does not load the page

Expected Result:-
System should load the page without taking a lot of time.