Save for Web - Figuring out what breaks it

@Kevin Stohlmeyer Yes it seems to work again if unlink oneDrive (this also causes onedrive to log out and close) if I just close OneDrive without unlinking then I can't use Save for Web. In my other user profile (for testing purposes) I have onedrive enabled, I can save for web no problems at all. It's very strange.

I just re-linked oneDrive and it's all working and saving again as you would except to OneDrive with no errors, but I know it's only a mater of time before it breaks again. I'd love to figure out what is causing it to break.

I think this has to do with which folder it defaults to for saving somehow while using Save for Web, and maybe alias folders plays into this as well, which would explain why people are having problems with DropBox and other syncing services. I'll have to think of some more tests for this theory. 

The problem is our org is hugely dependent on OneDrive, that isn't going to magically just stop being used here,  and some of our designers are very dependent on Save for Web. 

@davidt64328623 are you able to remove OneDrive completely on a test machine to see if this resolves?

I tested on my Mac here (M2, OneDrive corporate account) and the error comes up with One Drive active.

If I log out and quit One Drive it works again. I'm not saving to the One Drive location either.

Is everything local? Files and save location? Does Photoshop have full disk access? You may just want to run with admin privileges anyway. Mac isn't really like Windows when it comes to account privs.

Hi kevin stohlmeyer, I did try turning off OneDrive, unfortunetly that doesn't help. I had read your post in that thread months ago and had tried it againt recently with no luck. This has been an issue for a long time in our org.

To be clear - this has to do with a OneDrive update that broke this feature. Something with the sync is still affecting the entire HD not just the sync folder.

@davidt64328623 One Drive has been well documented in this forum specifically for the situation you are describing. Turn off One Drive syncing and try Save for Web.

I do product photography and every one of my output files goes through Save for Web, to the tune of thousands. I've had numerous issues along the way but SfW has always been rock solid. I'm just saying, people want to use files on a cloud service and its not reliable. Local files should be fine.

If the file is in a non-onedrive folder (like downloads) and you save to downloads, and you still have the same error, then what? You aren't allowed to have any cloud storage on your device at all ?

DO NOT USE CLOUD SERVICES WITH ADOBE APPS.

They usually work until they fail and then everyone is confused. ONLY ONLY ONLY work on local files.

It seems to me it has something to do with OneDrive, but not necessarily OneDrive that is causing the issues. 
Breaking it initially was triggered by uninstalling/re-installing Photoshop - OneDrive was functiong with it fine at the time.
On the second profile, it was broken after setting up oneDrive on the new profile.

It seems to not matter if the file you are working on, or the location you are saving to is in OneDrive or not.
On the second profile, after it was broken, I tried navigating to the downloads folder, via the Mac HD, suddenly it started working again. I could save to OneDrive folders and non-OneDrive folders again.

I tried to re-produce this on another Mac that is having the Save for Web problem but before I had a chance to try Save for Web was working. 
Now 2 days later, it's not working again for that user, so we re-produced what 'fixed' it for me, but no luck. 
I'm not sure what the pattern is here.