If you are unable to use a streaming service with AdBlock VPN it might be that the VPN server has been added to a blocklist. Streaming providers want to keep their content in certain regions, and since they cannot always tell which country a VPN user is in while watching, the streaming provider may assume that the streaming is from abroad and block it.
An incorrect browser setting like the wrong language or inactive tracking protection may also prevent the streaming site from working. Deleting your browser cache and cookies or using the browser in incognito mode might also help.