I can't make my VPN work anymore

I can't make my VPN work anymore

As part of my freelance work, I have to use a VPN, but since I renewed my monthly subscription, I am having a hard time visiting sites. It's not my connection as I can load the same sites when the VPN is not active. I need my VPN so that I can work. It was just fine a week ago, but now not working at all. I don't know what to do now.