Sometimes when your device loads a page (before you switch on VPN for example) - your device remembers the settings for that page via cache/cookies and you cannot open it until it's all cleared and you start from scratch.
This happens for me all the time when I want to watch US shows etc. I need to go back and clear my cache etc, turn my VPN to a different country and then reload…Changing your IPN isn't enough for whatever reason - I don't really get it myself (≧∀≦)
Is your VPN set to the USA or Canada at all? They are usually what mine is set to and Tappytoon works for me. Here's the link to the site I use:
https://www.tappytoon.com/comics/onoroffm
Other than that I'm not sure unfortunately, it's very unusual...

I can't purchase the tappytoon app even with vpn it says this item is not available in your country.
Is there a way i can get free points in the website??? Ads games?,