Imgur lies and gaslights, please don't use them.
While using a VPN, they will say "Imgur is temporarily over capacity. Please try again later." But if you don't use a VPN, then it magically works.
Sorry about that. I'll search somewhere better to post it while I don't have a website for it.
Meanwhile I found this random image upload website which might work:
Maybe over the capacity allocated for VPN originating traffic? I would never interpret a user-facing error message like that on a public site to be a reliable claim of what's actually going on in the underlying infrastructure. For any service.