can you help?

Hello Anton

Please share your administrator access here to check the issue. Use the Hidden Content box to share the credentials.

Best regards

Hello Ofi Khan

it looks like the problem of the conversion method to punycode and the error "This is already a Punycode string"

probably this applies to the problems of Joomla 4, but it would be cool if you help solve the problem

Please tell me, does it make sense to wait for some solution to this problem, or is it better to use Joomla 3 to create a website?

sorry, there was no time to wait for an answer... therefore, I demolished everything and made it on joomla 3 if you are interested in testing and correcting errors, I can pour that option on joomla 4 to another domain?

Oh! In our testing we have not found any issue on Joomla 4. If you are okay with Joomla 3, then you may use it. Or you can share Joomla 4 access with me to check the issue.

here you can see how hosting works for 12 days it will work

I have created a form builder page and checked it. There is issue with your email addresss. I have tried my email address and it works. Please contact your hosting provider for server configured email address.

doesn't email sending work on CYRILLIC domains try with info@перетяжка-салона.рус or similar

Yes, this will not work. Try with an English language email address.