How to unlock the item called Dark Matter

[lce]

I followed the community and I linked my account,but the gloves still remain locked

[Blockhead]

Probably related to this issue:

https://steamcommunity.com/app/218620/discussions/8/4349987747243849183/

There's a mod called 'Fix Community Items Lock' that should fix the problem; otherwise you can try leaving and rejoining the group.