[VE][106] async value in script tag

Hello



I am getting this error when validating my website:

Validating http://www.cadistas1910.com/ficha_jugador.php?idjugador=1304
Error [106]: "X is not a member of a group specified for any attribute"

*Line 32, Column 15*: "ASYNC" is not a member of a group specified for any
attribute

<script async src="https://www.googletagmanager.com/gtag/js?id=UA-54180502-1"><…



But according to this URL, this is totally valid syntax:

https://www.w3schools.com/tags/att_script_async.asp


Can you please review?



-- 
*Manolo Gómez*

  @manolaincadiz <http://twitter.com/#%21/manolaincadiz/>