6. Hover


this is my code:
$(document).ready(function() {


and there is an error:
Oops, try again. Unable to get property '1' of undefined or null reference .



++++ reset of session *****************
under certain circumstances you can shoot your Browser in an
inconsistent state.

Therefor it is of an advantage to know that you have 2 reset facilities:

One is the use of the F5-key which does a refresh Browser


Two, select&copy your code
Then use the Reset Code button of the course-window,
then paste your code back in.

General Notes:
Always refresh the browser after making corrections:
CTRL f5 ( if on Windows or Linux)
CMD r ( if on a MAC).
CTRL 0 to reset browser zoom


Dear leonhard_wettengmx_n ,
Thank you for answering me, I am very Greatful


I have exactly the same error and nothing doesn't work :frowning: looks like a big bug


I fixed same error.
1. CTRL 0 to** reset browser zoom**
2. CTRL f5 ( if on Windows or Linux) or CMD r ( if on a MAC).


have to wait until the effect of hover fully "darken" the button, if you move mose quickly it doesnt count


Also, make sure to only highlight one menu item and then move the mouse away. Don't hover over a second or third menu item or else you will still get the null reference error.