To deploy Voice CTI Integration in CRM Environment using Avaya Workspaces and Unified service Desk we need to use URL with https and not with http...
URL: http://localhost:5000/?phonenumber=xxxx
The above URL works fine with http and with https it gives error "Connection to the site is not secure."
Following the blog https://neilparkhurst.com/2016/01/01/usd-cti-generic-listener/ and https://docs.microsoft.com/en-us/dynamics365/unified-service-desk/use-generic-listener-adapter-unified-service-desk?view=dynamics-usd-4.2