Product options for the configurable products are not coming at the product page.
echo $this->getJsonConfig()
did not return any value and the page breaks after var spConfig = new Product.Config(. I cant see any error in the log files. When I am going to page source I can see var spConfig = new Product.Config( and page ends. It could not load rest of the things after that script. Only select boxes are showing but no options are there.
I could not understand what is the issue. Please suggest some solutions. Thank you in advance.