Imgur now blocks several VPNs and have issues loading embedded previews in several fediverse platforms. So instead of using imgur, you could use one of the following alternatives for uploading your images.
https://postimages.org/
https://imgbox.com/
https://imgbb.com/
https://www.imagebam.com/
Before anyone mentions 0x0.st or ttm.sh as alternatives, both of them will delete your files within a year of being uploaded so do not use them for anything permanent.