Pro Sites 3.5 - can't upgrade with stripe

Hello

After installing Pro Sites 3.5.0.4 it stopped working with my template.

I can't upgrade a site to the Pro level with a stripe gateway. I am using a Stripe in a test mode.

I applied a patch from the forum and it downgrade my version to 3.5.0.3

After the checkout I get the message that subscription ends today. So when I try to upgrade on 7th July 2015 after checkout it shows the subscription ends 7th July 2015. So it doesn't upgrade. Can't see any upgrade changes in a dashboard and network dashboard as well.
In Stripe pane;l there's a new customer created but with no card details or payment.

Somehow I managed to successfully walk through the whole checkout process on the default template (Twenty Fifteen) with all plugins deactivated. After switching back to my template (all plugins deactivated) I can't upgrade any site.

Webhooks and API keys are correctly configured.

Could you please provide the solution as the plugin was working OK with my template and now it stopped.

Regards
Jack