What country are you trying to visit from (when not using the VPN)?

Switzerland but it seems to have fixed itself.

I later found out that I had the same problem with tvdb. It seems that both your sites or at least the Public IPs are from Amazon Servers and protectet by cloudflare. Maybe one of them temporally blocked my IP. idk. Sorry for taking up your time. Next time I'll wait for a day.

Thanks anyway and wish you a nice day.

We only use Cloudflare for our images (not the website or API), so that wouldn't have prevented access to the website. We do use AWS though, so that sounds like that could have been it.

In any case, happy to hear you sorted it out.