In order to fix the problems, navigate to the official web page, click the Download button and download and install the latest version of the program. After that, navigate to Start > Control Panel > System and Security > Windows Firewall > Allow a program through Windows Firewall and check the box next to VykeXL. If you can't find the application in the "Allowed programs and features" window, press the Allow another program button, navigate to the installation directory, select the executable file and press Add.
After that, from the Advanced Settings select Inbound Rules > New Rule. Check the Port box, click Next, select All local Ports and follow the self-explained steps. Next, make sure that your security program doesn't block the connection. Also, you need to know that countries like China, Syria, Turkey, Malaysia, Bahrain, Belize, Iran, Kuwait, Libya, North Korea, Pakistan, Thailand, Tunisia or Vietnam blocked the VoIP services. If the error persists, I recommend you use the Contact Us Now page to get in touch with the support team.