Lost write permission to local nextcloud folder in powershell

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Nextcloud version (eg, 20.0.5): 3.3.6 (Windows)
Operating system and version (eg, Ubuntu 20.04): Windows 10

The issue you are facing:

I access my nextcloud folder through command line quite regularly, and today I discovered I can’t create any new files any more. For example, git can’t create .lock files, mkdir doesn’t work. The errors are like this:

PS D:\Nextcloud>touch test
/usr/bin/touch: cannot touch 'test': No such file or directory
PS D:\Nextcloud>mkdir test
mkdir : Could not find file 'test'.
At line:1 char:1
+ mkdir test
+ ~~~~~~~~~~
    + CategoryInfo          : WriteError: (D:\Nextcloud\test:String) [New-Item], FileNotFoundException
    + FullyQualifiedErrorId : CreateDirectoryIOError,Microsoft.PowerShell.Commands.NewItemCommand

I have no problem using command line in the parent folder (D:), or anywhere else, and I can create files just fine using windows explorer. It’s just powershell that seems to have stopped working (including dos prompt). Running powershell as administrator doesn’t work, either.

According to msi.log I installed 3.3.6 on 9/11/2021, but I’ve only noticed this problem today (a month later). I do however keep my workstation on all the time, and I rebooted it a couple of days ago.

Is this the first time you’ve seen this error? (Y/N): Y

Steps to replicate it:

  1. No idea, update to 3.3.6?

The output of your Nextcloud MSI log:

I’m not sure if posting 10,000 lines is a good idea here.

Well I’ve figured out what I had done.

I added Nextcloud to the “Protected folders”, and had only enabled access to the client. I needed to grant git/powershell/etc as well.