Unknown error message 1003 -means I can't reinstall and access Creative Cloud

I have had this error message '1003' in Creative Cloud appearing for months-tried reinstalling twice but it still appears. Now I can't go in and update at all as my organisation's subscription has expired and I need to log-in to sort out the new subscription. Message says: 'Creative Cloud desktop failed to update (Error code: 1003).' It would be helpful if this error code had some info around it in your list but it's not included. It's also blocked the blue circle at the top of the Cloud so I can't log in. Any info gratefully received as the I.T. team cannot fix it. Thanks.