I use uBlock, although disabling it has no effect. I noticed that when I loaded it via HTTPs (your certificate is okay for a random OVH domain but not for yours – I recommend Lets Encrypt for a certificate) everything works fine after a few seconds. I’m using HTTPs everywhere, but it isn’t set to block insecure requests – so I doubt it is related.
EDIT: If you want some help setting up faster hosting (with HTTPs) feel free to ask me. I’ve setup many websites for Minecraft servers and this doesn’t seem to be all that different.