Call to Arms - Gates of Hell: Ostfront Coop resource desynchronization even with same mods

What To Check

Usually this has to be done by the one who has been subscribed to the mods a while:

Go to the workshop tab and filter to your subscribed items.

See if anything you are trying to use was recently updated ("Last updated" date should be listed)

If anything has "Last updated" more recent than "Subscribed on", unsubscribe to it and then resubscribe to manually force the update

If it still doesn't work, the last resort is to unsub and resub all mods to be 100% sure.

Source: https://steamcommunity.com/sharedfiles/filedetails/?id=3125222309