Hello Brian. Thanks for answering

The version I am using of the templates is this:

WT-Antique-J3x-Joomla-Quickstart-1.0.7
and Joomla is in version 3.8.5

The administrator has not made changes that I know, however I will consult.

Effectively there were changes in the security of the servers that I have contracted so the administrator of the service enabled the extension base64_decode ()

Now every time I raise a site with Joomla with this server I have to communicate with them to enable this extension.

Thank you very much Brian for your attention