AE plugin can't access license server

For years customers have registered my plugin through an effect button which queries my license server.

Lately customers report this doesn't work.

If I add the following to the After Effects' info.plist file it does work.

<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key> <true/>
</dict>

If I add the same to my plugin's info.plist, it still doesn't work.

Of course, I can't ask my customers to modify the After Effects info.plist,

so how can I get around this problem?