The designer doesn't work goes up to 25% and doesn't charge

Hi can you help me please?

The designer doesn’t load, it only goes up to 25% and I can’t restore the backup or publish the site.
The site was working fine and suddenly it started giving me these problems.
I have some scripts that I can also remove, but I can’t access the designer to modify them.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

@Francesco1 - If you have followed basic troubleshooting (no browser extensions loaded, ruled out networking issues, tried incognito mode, etc…) then I would open a support ticket.