Site Broken while update my custom app or frappe app

While update is available in my frappe all apps and in my custom app when i try to migrate the site at that time my site was broken every time why this happening here i attached the screenshot if anyone have solution please share with me.

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this is a common issue when updating apps on Frappe Cloud. The site breaks during migration usually due to a conflict between your custom app and the updated Frappe/ERPNext version.

what you can do:

Go to your Frappe Cloud dashboard → your site → Logs and check the error

Try updating apps one by one (Frappe first, then ERPNext, then your custom app) instead of all at once

If the issue is with your custom app, temporarily remove it, run the update, then reinstall it

If nothing works, raise a support ticket on frappecloud.com — they have direct access to your logs and can fix it quickly