BTW, if I'm a moron and did not see a previous issue relating to this, I'm sorry.

You mention two steps that you took, but it's not clear when the problem happened. Did the error occur during launching, or sometime later?

The problem occurres a few seconds after running CKAN. Also, I don't have my computer in front of me right now.

I'm in front of my computer and can work on the issue.

So you launch CKAN, and you wait a few seconds without doing anything else, and it crashes?

If you are clicking something, please specify exactly what.

I am not clicking anything. I just launch it, then this crash occurs.

Thanks, that helps.

The stack trace implies that registry is null in ScanDlc, which implies that JsonConvert.DeserializeObject returned null in Load, which suggests a problem in creating the registry. This looks like it may be related to KSP-CKAN/NetKAN#6459, which also describes a mysterious crash along a same or similar code path.

Can you please check whether a file called registry.json exists in the CKAN subdirectory of your KSP install?

I'm not exactly sure which of my two KSP installs it's looking at, but i'll check both.

Both installs have a registry.json.

However, I did get an idea about the issue...

Thanks for those screenshots; the file should never be 0 KB, so that gives us another clue as to what's going on. If you delete the registry.json file, does it reappear as 0 KB?

One sec

Well, crap. It worked when I deleted the registry files. Case closed.

Well, we still shouldn't be generating a 0 KB registry file to begin with, and we should be handling its existence more gracefully. I'm going to re-open this so we can deal with those issues...