Decaring a var as String doesn't raise error

[MagTun]

If I declare a var in my sketch as a string like this:

String myvar ='abc';

and then verify my sketch, Arduino raises an error. (I have to set it as char)

But if I verify the same sketch with VS Code Arduino then I don't have an error.

For both, I set the board as NodeMCU 1.0 (ESP-12E module)

[czgtest]

I try to use this string , it also raise an error with vscode arduino.
Arduino IDE : 1.8.8
Arduino Extension: 0.2.24

[MagTun]

I don't get the error now. Not sure what changed (I have change my arduino version in the meantime, so maybe this is the reason)