eslint-plugin-react: Getting wrong error "Strings not allowed in JSX files" in prop

I’m getting error in this:

<div className={`col-12 grid input-cont ${shouldUseDefaultClasses && defaultContClass} ${contClass}`}>

The error is:

error  Strings not allowed in JSX files: “`col-12 grid input-cont ${shouldUseDefaultClasses && defaultContClass} ${contClass}`”  react/jsx-no-literals

There is no string in the className, not sure what am I missing here.