[Bug] Cache path setting can be just a drive letter but it doesn't work

[navuek]

Background

• Win11
• CKAN Version: V1.31.2
• KSP Version: V1.12.5.3190

Have you made any manual changes to your GameData folder (i.e., not via CKAN)? No

Problem

Installation fails every time for what ever mods used.

Steps to reproduce
It seems what causes the error during installation is changing the cache directory in the settings as shown in the picture:(Blue is before change, red after)

then i try to change the directory by just entering through the text box

at first it seems like it works, but do not be fooled, it's sneaky.
then after leaving and re-entering the settings page, this is what you get

you can no longer edit the download cache location with the change button or any button.

then when attempting to install a mod an error will be out put as so:
Access to the path 'E:\System Volume Information' is denied.
Error during installation!
If the above message indicates a download error, please try again. Otherwise, please open an issue for us to investigate.
If you suspect a metadata problem: https://github.com/KSP-CKAN/NetKAN/issues/new/choose
If you suspect a bug in the client: https://github.com/KSP-CKAN/CKAN/issues/new/choose

Be advised - if you first install a mod or two, then try to change the directory. it will all work as it should with no problems!
Expected behavior
Installation succesful

CKAN DOWNLOAD CACHE EDIT FAILURE.txt

[navuek]

I just reinstalled KSP into another drive, and put CKAN into the same drive F.
And i still get the error attempting to find system volume information of drive E. something is bugged here.

[HebaruSan]

Is your download folder configured to use the E: drive?

Do you have an E: drive?

[navuek]

Yes i have an E drive, The old cache folder was in the E drive but now i can't even change it, the Directory stays blank like so no matter how many times i change it and to what drive i change it

[HebaruSan]

Does the "Change..." button do anything?
What about "Reset"?

[navuek]

Yes it open the 'browse for folder window' and the window works, but it stays blank after i click OK

Reset does nothing, it remains blank

[navuek]

When i press Open, it opens the E:\ drive in file explorer

[HebaruSan]

OK, can you close CKAN and then run it from a command prompt like this (from whatever folder has your ckan.exe)?

.\ckan.exe --debug --show-console

... and then try the Reset button again? It looks like something is throwing an exception, and that would let us see it.

[navuek]

Wilco

[HebaruSan]

(The "N files, M MB" string is a placeholder that's supposed to be overwritten with real info about your cache folder, so something's stopping it from getting to that point.)

[navuek]

That's what i get when input that command in the CMD in the folder that contains the EXE

[HebaruSan]

That error means that folder does not contain ckan.exe, unfortunately. Maybe double check it?

Oh, I didn't notice you're using powershell! Try this instead:

.\ckan.exe --debug --show-console

Forgot that PS adopted Unix's practice of not executing files in current dir by default.

[navuek]

Now it's running!
give me a moment

[navuek]

When trying to input a new directory the CMD doesn't react at all, no change, no new lines
some lines were added when the install failed however. so I added below the entire output of the cmd
CKAN INSTALL FAILURE.txt

[navuek]

When i don't mess with the directory of the cache and reach that weird state where the line is empty, the installations just work
i just managed to install the kerbal engineer and testing it now

it seems that any change to the cache directory bricks the program, but resetting it completely by deleting the CKAN localdata folder and reinstalling KSP fixes it
atleast letting me use the CKAN

[navuek]

edited to reflect the problem seems to stem from changing the download cache location

[navuek]

Here is the json config file:

{
  "AutoStartInstance": null,
  "DownloadCacheDir": "E:",
  "CacheSizeLimit": null,
  "RefreshRate": null,
  "Language": "en-US",
  "GameInstances": [
    {
      "Name": "Kerbal Space Program",
      "Path": "F:/SteamLibrary/steamapps/common/Kerbal Space Program",
      "Game": "KSP"
    }
  ],
  "AuthTokens": {},
  "GlobalInstallFilters": []
}