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/
Upvoted for the Fediverse and FOSS features, but if you’re looking for a simple FOSS image hosting service devoid of any social features then also look up for any Lutim instance
Some working instance (there are less and less for service being free and focussed on hosting images makes it a cost hard to sustain for any volunteer individual or association)
https://www.chatons.org/search/by-service?service_type_target_id=All&field_alternatives_aux_services_target_id=All&field_software_target_id=234&field_is_shared_value=All&title=