i m using sales kit to add multiple item in a kit from my inventory but it doesnt save the quatitiy it makes it 0 no matter how much quantity i write

i m using v 2.3.19 of front accounting  i have installed dashboard module in it but i m unable to use it properly. dashboard extension is installed and showing the dashboard on the all tabs likes sales, purchase(eg. top 10 customers, last 10 sales and things like that) except on dashboard tab not even showing the add button to add the widget on the dashboard screen.If  from setup if i go to the dashboard setup or reminder setup it gives this error
[an error occurred while processing this directive] .

please help i ll be very thankful.