Support

Right now, the only information we have lets as go only as far as understanding that something is blocked by the Admin Tools Web Application Firewall but we don't know which URL it is, or why it's blocked. What we need to help you is the actual URL that is being called, and what Admin Tools reports in its Blocked Requests Log as the Reason for blocking it.

Thank you in advance for helping us help you!

Based on these crumbs of circumstantial evidence I am going to make an educated guess.

I believe that you have enabled the administrator secret URL parameter feature. You can find this in your site's administrator, Components, Admin Tools for Joomla!, Web Application Firewall, Configure WAF.

Let's say that the "Administrator secret URL parameter" is set to foobar so I can demonstrate the solution. This means that you have to access your site's administrator as https://delawarecoastalflyingclub.com/administrator/index.php?foobar  Otherwise, the request will get blocked. If the request gets blocked too many times, the IP gets blocked.

If you want to add more URL parameters, you can. I am not sure about your technical level, so ignore me if you already know what I am saying here. The URL would become https://delawarecoastalflyingclub.com/administrator/index.php?foobar&__RANDOM__=rd   That is to say, instead of a second question mark, you get an ampersand to separate the secret URL parameter with the rest of the URL parameters.

You're welcome! Have a wonderful day :)

Site's administrator, Components, Admin Tools, Web Application Firewall, Configure WAF. There's the Secret URL Parameter right there. Remove all contents from that box, then click on Save & Close in the toolbar.