Frappe CRM Lead create crashes browser

I have multiple crm instance working on same bench version 15,

I have changes some field names and added some extra fields to the crm via my custom app hooks.py.

It was working fine but now only one site crashes when i click on lead create button, all other functionalities working fine in the instance. Other crm instances are working fine now.

No console errors and no network calls initiated while i click on create lead