Can't add new Navigation?

In my admin->Builders->Navigation Menu Builder

Whenever I tried to drag "NEW ITEM" to the Active Items section, it always give me this error:

"Sorry couldn't insert object"

This is my database error:

Database error in Dolphin
Query:
INSERT INTO `TopMenu` ( `Name`, `Type` ) VALUES ( 'NEW ITEM', 'top' )

Mysql error:
Field 'Onclick' doesn't have a default value

Not sure this is the answer in this case but try different browsers  ..... 
No browser is consistent across the entire installation  ..... 
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Rather strange because the onclick field in the TopMenu table has no default value to begin with  ..... 
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I fixed the issue by making the column a "null" instead of not null

Could you elaborate on where you made that change to null?

I seem to be having the exact same issues, among others.

Thanks in advance.

go to phpMyAdmin > TopMenu table and click on structure an change onclick from null to not null  ..... 
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It was set that way, I desided to try and set it to allow null and although I get a different error now, the nav builder will let me add and edit new items.

Wierd -

Now I wish I could get the fields builder to work.