VS Code suddenly cannot connect in WSL (Windows 11)

I am currently using Remote Explorer to connect to my WSL in Ubuntu 20.04. Then, it suddenly threw an error, and I can't find a way to fix it. I have been debugging this for almost a day, but still no luck.

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I have already tried:

-Shutting down WSL and restarting my PC.-Uninstalling Ubuntu 20.04 and then reinstalling it.-Uninstalling VS Code and then reinstalling it again.

I have a hunch that I just need to change the VS Code configuration, but I don't know how to do it (I have already checked the settings).