I know this is an issue our engineering team is aware of and is related to a conflict between having both the Adobe Creative Cloud app file sync service and Dropbox both set to load when booting a computer. Engineering has suggested this workaround
Turn Sync off and Sync-on
If it does not resolve the Issue the below steps need to be performed:
Quit Creative Cloud app and all the related processes (command + option + Q).
There hasn't been very many other reports of this issue, but for those that have, it has been resolved by either uninstalling Dropbox (if you don't use it) or disabling it from loading when booting the computer (I've heard this can be difficult too at times because it re-enables itself). I found these related resources which might help:
Thanks for your reply David. I'm not sure what you mean by "turn sync-off and sync-on"
Otherwise as I said before I do not want to disable Dropbox in any way. It is critical to my workflow. My only workaround at this point is to disable Creative Cloud and enable it when I need it. Which has started to become less frequent as I'm finding I can use Affinity Designer and Affinity Photo for more of my projects.
But if Adobe fixes this I might be inclined to go back to using Creative Cloud apps again more often.