Size Chart, Delivery, Ask modules in the Kalles theme

I use the Kalles theme. When I connect the page to the Size Chart, Delivery, Ask modules and click to use it, the page turns black and Ask cannot be used. What is the problem?

Hi,

Try following:

Check for Theme Updates
Clear Cache
Disable Other Apps
Check for JavaScript conflicts
Check the theme settings for these modules within the Kalles theme settings
Contact Support