Expected RBRACE at line 64, col30

I cannot understand what is wrong. The css still does its job but I still get this error. I use Dreamweaver btw. I do not get an error if I remove this part.

.video-preview-description{
    display: grid;
    grid-template-columns: 50px 1fr; (HERE IS LINE 64)
}

>Solution :

https://community.adobe.com/t5/dreamweaver-discussions/expected-rbrace-at-line-4-col-2-is-this-error-a-bug/td-p/10547718

It might be a bug in dreamweaver