accidentally disabled error markup vs
Click Right Click in your editor window and select for 'Command Pallet'
option
OR press CTRL+SHIFT+P and search for the option 'Enable Error Squiggle'
and just click on it. Reference Image That's it! If you want to Disable
Red Wavy underlines showed after syntax error, just Follow the above procedure
and search for 'Disable Error Squiggle' and click on it.