I opened VSCode and tried to start a mobile emulator but the device list didn’t appear on the command palette. I ran Run Flutter Doctor but its result was the following.
Another flutter command blocked the command execution. It didn’t solve even if I restart VSCode but the problem was solved after killing all dart processes by the following command.
taskkill /F /IM dart.exe
If it didn’t solve the problem I would try to remove the following file but it was not necessary.