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Javascript error

 
Greenhorn
Posts: 17
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Hi all! I got this error:

Uncaught TypeError: Cannot read property 'toString' of undefined
   at arrToString (mainwindow.js?build=20191003175404:7091)
   at arrToString (mainwindow.js?build=20191003175404:7086)
   at functionLibrary.addRestoreClientInfo (mainwindow.js?build=20191003175404:7104)
   at functionLibrary.doActionWithKey (Startup:433)
   at doAH1 (SavedContext.fl?A.CTX=27:315)
   at <anonymous>:1:49

Could anyone help me with this?

Here is my code:

 
Rancher
Posts: 4271
47
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That's a Javascript error.
The code you've posted is Java.

Where are you receiving this error?
 
Ombodi Gergő
Greenhorn
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In my browser Console.
 
Ombodi Gergő
Greenhorn
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I made this menu and when i click on it i got this error.
N-vtelen.png
[Thumbnail for N-vtelen.png]
 
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