Dependency on mimemagic 0.3.x no longer valid

[Kvit]

Your bundle is locked to mimemagic (0.3.4) from rubygems repository https://rubygems.org/ or installed locally, but that version can no longer be found in that source. That means the author of mimemagic (0.3.4) has removed it. You'll need to update your bundle to a version other than mimemagic (0.3.4) that hasn't been removed in order to install.
rails/rails#41750