Error – Expected an assignment or function call and instead saw an expression

Expected an assignment or function call and instead saw an expression is a common error whenever I forget adding return keyword to a function.

if(!loading) {
        return <p>Loading...</p>
    }
    else if (error) {
        <p>Some error occurred</p>
 //Error
    }

In the else if return statement, I missed the return keyword, causing this error.

if(!loading) {
        return <p>Loading...</p>
    }
    else if (error) {
        return <p>Some error occurred</p>
    }

Problem solved.