Sorry, but without sharing more details and just saying “it does not work” it is very hard to help you on your issue.
Would be great if you add to your support thread if you already followed the instructions in FAQ section… and if this did not help, share some details about the issue and the test script results within your ticket.
Hello, I use your plugin on 6 sites on 2 different hosts, now all the plugins display the same message: unable to connect. Since the latest version of Matomo. PHP 8.1 and similar configuration (theme, plugins).