Can't generate anything - error 503

[payments311]

I can't make it work.

I contacted my hosting support and they replied this:

Thank you for contacting us.

I've set max execution time in your PHP selector to 60 seconds now. Could you please try now and see if issue is resolved.
If issue still persists we'll set higher value.

later I got another error again and they replied this:

thank you for the update.
I've increased limit even more, however, still getting same issue.
Can you please provide us with the PHP settings that you would like us to set so we can assist you further.
You can probably get those from the application vendor.

See errors snapshots attached.

Can you assist?

[XML-Sitemaps Support]

Hello,  in this case I would recommend to run generator in command line if you have ssh access to your server.