Shows webiste can't be reached only on mobile browser

I have a SSL certificate installed on my website and it is on flexible mode and everything works fine but when i am trying to access the site on my mobile browser like in UC or other mobile default browser it says site can’t be reached and and shows ssl error like red cross on padlock on mobile browser.when i tried testing my webiste from whynopadlock.com it says this “The SSL certificate tests failed. Please be sure that you can connect to your site over SSL and try again”.and overall it is not working on other browser except in chrome browser.please help me fix this error someone please.my site was down for almost 3 months and now i have fixed it all and again this error showing, if i can’t access my site on the mobile browser then no one can.

My Website: https://internology91.ml/