Avast Ultimate doesn't work on IOS VPN

I have an Avast Ultimate subscription for 10 devices working on my Windows PCs and Mac but it doesn’t work on the mobile VPN app. When I enter the activation code it says “hmm that didn’t look right. check the activation code and try again.”. When I try pairing using my windows pc it says “We cant pair your device it seems you’ve got a single-platform subscription and you’re trying to activate it on a different platform.”. On the subscription, it said you can use it on all platforms.

https://support.avast.com/en-ww/article/Troubleshoot-activation

I have tried everything in: https://support.avast.com/en-ww/article/Troubleshoot-activation

Did you buy from Avast directly or from a reseller…?

Bought on Avast.com.

Contact support: https://support.avast.com/contact

Ok, ill contact support. Thanks.

You’re welcome.

did you solve it?
I have same problem