Hi @sayed
I don't use XMPP, but the error says, that the domain name of the certificate is wrong.
Checking your domain there is a cPanel-certificate ( https://check-your-website.server-daten.de/?q=myscrap.com ):
CN=myscrap.com
14.01.2019
14.04.2019
autodiscover.myscrap.com, cpanel.myscrap.com,
mail.myscrap.com, myscrap.com, webdisk.myscrap.com,
webmail.myscrap.com, www.myscrap.com - 7 entries
So your website works and you shouldn't install another certificate.
Isn't it possible to create an exception? Your website doesn't use HSTS.