Save Changes Button is Unresponsive

Hi team!

Need this fixed on priority please!

Issue 1:
I would like to inform you that the “Save changes” button is not responding and not saving the settings.

Can you please provide a hook to disable the “Guest users will be able to cancel their order using the link sent in their order email.” functionality?

The reason is Issue 2: When a registered user or guest user make an order, the cancel order button in the order email is displaying empty page.

Screenshot: https://snipboard.io/s3yind.jpg

Can you please come up with the fix?

Awaiting for your response, thank you! ??