In T189207#2756272, @Salutesh wrote:

Hello! For now you can use this mod or repack its contents in your own mod to hotfix the problem:
https://steamcommunity.com/workshop/filedetails/?id=3431076620

The workshop mod appears to be missing the keys folder.

In T189207#2756272, @Salutesh wrote:

Hello! For now you can use this mod or repack its contents in your own mod to hotfix the problem:
https://steamcommunity.com/workshop/filedetails/?id=3431076620

That’s great news. Thanks very much for that 👍

In T189207#2755981, @YouCanCallMeAlex wrote:

The exact same happens also on 1.26
Happened to me for weeks with the the tool slot (eg Hatchet) on the one backpack on KarmaKrew where you can attach buttons, a plastic bottle and a small tool.

I too had a similar issue when trying to load a mod onto my local server. Kept saying that the pbo was not part of the server, however it was. Everything was signed and keys copied over etc.