Just wondering if you ever came up with a resolution to this issue, even though it was posted a while ago. It just started happening to me as well and I can't explain why it happened. I have the exact same set of issues that Brandon described when opening file types on network shares in Code Writer. Interestingly, it started happening while I was editing code one a few days ago. For about an hour I was opening, editing, and saving files with no problems at all, then all of the sudden (no restart, update or anything that I'm aware of happened), when I went to open and edit a different file, I get the 'no such interface supported' error. Like Brandon said, if I launch a file on the local drive, there's no issue and if I open the network files directly with Code Writer rather from file explorer, also no issues. Very strange indeed. I wasn't working on or doing anything else in the background at the time, so something seems to have changed all on its own. I went into the Windows Store to see if a recent update to the app might have broken something (thinking maybe the update had taken place in the background while I was working) and the app doesn't show up in my library in the store at all, even though it's installed on several of my PCs, so I can't see when it was most recently updated. Running Windows 11 22H2, build 22621.521. If having any other information would be useful, let me know. I'm happy to help troubleshoot.
Thanks for your help and for a great app. I love using Code Writer!