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).
Ok, but did you ever try to run the test script as described in the FAQ section? Maybe this will already help to solve the issue, otherwise it would help if you post the the test script’s output to your support thread.
Please understand that just saying that it doesn’t work is not a sufficient error description on the basis of which you could be helped in any way.