Hello Nicholas,
thank for sharing the article with me. I went through each step carefully and have no success in connecting the site still.
Here is a message that I get after every try:
"Could not connect to the remote site.
Troubleshooting Information
Warning: Undefined variable $isWordpress in /home/httpd/vhosts/site-monitor.n3e.ch/httpdocs/tmp/compiled_templates/d/d/ddbd9aa236986dbb3791a714d7cfc570ddbf3e97.php on line 214
Uh oh. Something is totally broken here…
Normally we can detect the nature of the connection error and provide some useful troubleshooting information here, or at least point you to some kind of useful, third party troubleshooting resource. When this is not the case, we can at least print out an error message which will help us help you troubleshoot it.
Instead, we got an error which we should be able to provide troubleshooting information for (Akeeba\Panopticon\Exception\SiteConnection\APIApplicationIsBroken), but we don't have the code for it. This should have not happened.
Please delete all files and folders inside the tmp folder of Akeeba Panopticon. This addresses the problem of this page's cached copy being severely out of date. If this doesn't help, please let us know."
Please advise, what else can I do in this case?