You might have edited your blogs template several times and gotten error messages just as the one in the image below, it may be Adsense verification code, ad code or any other code that contains ‘async’. Getting the problem solved is easy, just follow the instructions below.
Study the code well and look for async
Add =”async” at the front of async without spaces.
<script ="" async="async".... ></script>
Save your code.
That’s it. The error message will disappear immediately.