Hello, i tried your page but the problem is not that the popup does not open.
The popup opens up but after a while it remove all contents of the page and shows only a blank page.
Only think i noticed in the console is the following https message that maybe you can fix:
Mixed Content: The page at 'https://sapbazar.com/ru/component/community/1462-praveen-marati/profile?Itemid=276' was loaded over HTTPS, but requested an insecure image 'http://sapbazar.com/templates/responsivizer/images/xwhitest_menunav.png.pagespeed.ic.AEKmnPkmX9.png'. This content should also be served over HTTPS.