I am constantly getting an error 'Expecting a function in instanceof check, but got undefined'

Language Help HTML
1

I am constantly getting an error ‘Expecting a function in instanceof check, but got undefined’ even after i have edited the code between the h1 tags. Please help.

2

@reehanshah,

Please give us the FULL HTML & CSS code you are using…

3

Hi.I have the same experience before.
When i finished my code and clicked the button,the page indicated that error you said.
I think the problem is the right page(which show the effect of your code)
Is your right page still loading?(if yes,you will see a circle running)
The answer will be judged until the right page finished.
if at that time,you do the right instructions, you will find you can go to the next class.

anyway,i think the problem may lie the speed of your Internet.
So you can wait a minute then you may find the error tips may go away.

4

Hi,I meet the same problem agian.
Did you solve it?
Can you tell me how to solve it?
Thank you!!