In general, VPNs (Virtual Private Networks) do not cause problems. They are designed to enhance security and privacy when you are connected to the internet, and they can be especially useful when you are using a public Wi-Fi network.
However, like any other software, VPNs can sometimes have bugs or glitches that can cause problems. For example, you might experience slow speeds or connection issues if the VPN server you are using is overcrowded or experiencing technical problems.
Additionally, some VPNs may not be compatible with certain websites or services, which can cause problems when you try to access them. For example, if a website is only available in certain countries, using a VPN with a server located in a different country might cause the website to be blocked.
Overall, VPNs are generally very reliable and can be a useful tool for enhancing your online security and privacy. If you do encounter any problems while using a VPN, you should contact the VPN provider for assistance.