ClicktoDial Module

Hello,
I just installed ClickToDial Module in Dolibarr version 16.0.3 in Ubuntu 22.04 LTS. I keep getting the same error message in the browser (Firefox and Chrome) when I click on the phone number in the Phone Card “error:error”. The default link looks like this:

For help I used the wikidolibarr website: Module ClickToDial En - Dolibarr ERP CRM Wiki
and have gone through all the steps, however it does not work to open the softphone (linphone) with the URL (sip:<telephone number @asteriskserver>.
Can anyone help?