Docker doesn't seem to work any longer

I don't use my server (OMV 4) very often, it spends most of it's time shutdown, earlier today I noticed I no longer had my shortcuts on the splash pages (I forget what this was called but it ran in docker). I've only now had time to have a look into it, when logged into the server I can no longer see any Docker menu under services (I think it used to be there?), I can see it's there under OMV extras and it's on. I'm not even sure where to start looking as to why it's no longer working, it may have updated (or something) and now no longer works? As I mentioned the server spends most of it's time OFF, I do turn it on the odd time to backup files but I don't typically interact with the user interface so I've no idea when it stopped working.