I’ve run into this problem a few times, usually when source control is involved.
-Delete the package from you /packages folder
-open nuget package manager, it will notify that things are out of sync- click the resolve button.
-if you have version conflicts, edit your dependentAssembly bindingRedirect so that the older version(s) are redirected to the newer.
-You may also try uninstalling using nuget and reinstalling, but this usually doesn’t fix everything.