So, I've recently encountered an issue with not being able to open secure steel cabinets and toxin cabinets with id card restrictions on my custom sub. Thankfully I have managed to fix it, and I think other players may run into the same issue, so I have decided to post the solution here:

Let's say you have a locker with the restrictions "id_captain,id_security", and you can't open it as captain.

The issue on my end was that the spawnpoints of captain did not have the "ID Card tags" of "id_captain". You can look at the spawnpoints of vanilla subs to see what the corresponding ID card tags of other jobs should be.