Recent DLC item skin will currently not work with the way skins are being handled by these 2 plugins. Facepunch added it so skinId itself won't reskin those items, instead they added a redirect feature which then creates a totally different item and removes the inital one. So this would have to be added for all plugins that fiddle around with skins really
ArgumentNullException at Rust.Workshop.ApprovedSkinInfoError
Console error looks like this

im using same plugin works fine here
> o.reload ItemSkinRandomizer
ItemSkinRandomizer was compiled successfully in 2080ms
Unloaded plugin Item Skin Randomizer v1.5.3 by Orange
Loaded plugin Item Skin Randomizer v1.5.3 by Orange
Unload it and remove your config then reload it
> o.reload ItemSkinRandomizer
ItemSkinRandomizer was compiled successfully in 2080ms
Unloaded plugin Item Skin Randomizer v1.5.3 by Orange
Loaded plugin Item Skin Randomizer v1.5.3 by Orange
Unload it and remove your config then reload it
nope dont working
Merged post
Have this error and versions

Merged post
Have this error and versions