Intermittent error in quotes - No Line Item

There seems to be an intermittent error in the Quotes module. When i create a new quote, and get to the Add Group button, it just adds a blank line for Line Item, instead of the detail product picker., See attached photo.
It seems to be only if you use the CREATE button on the quotes page, meaning the button next to search boc. If you use the CREATE QUOTE menu item from the QUOTE TAB dropdown it seems to work.

Hi Isnyman,

Please disable AJAX for the Quotes module and then try creating a quote.

Thanks,

Will.

Soory, I am not an expert but where would i do that?

Hi Isnyman,

Navigate to Admin -> System Settings -> Configure AJAX User Interface and drag the “Quotes” module over to disabled, click Save and try to create your quote.

Thanks,

Will.

Ok, the button moved but now seems to be working.
Thank you very much.
Could you take a look at my questions in the General Discussion forum? I am trying to figure out how to make dependant dropdowns and as far as I can see, the Parent Category/SubProduct Category has no use because you cant use them as qualifiers anywhere.
Thanks again