Hey Saurabh,
Thanks for contacting us and sorry to hear that you are facing this issue.
You can follow the below options.
Option 1:
Change DNS Address to Open DNS

• Right click on your network icon from windows task bar then click on ‘Network and Sharing Center’.
•  Go to ‘Local Area Connection’ and click on it, then from the new window click on ‘Properties’. 
• Then select ‘Internet Protocol Version 4′ and hit ‘Properties’ again.
• In the new window select the radio button that says ‘Use the following DNS server addresses’ and then in the preferred DNS server box type in 208.67.222.222 and in the alternate DNS server box type in 208.67.220.220
• Then check the box ‘Validate settings upon exit’ and click OK.

Now try to load the webpages that was showing error and see if it has solved.


Option 2:
Clear Cache, Reinstall your browser

Option3:
Reboot, Power Cycle Your Router


One of the above options should work for you.

If it doesn't work, please feel free to get back to us again and we will surely help you out.

Thank You!
Lokesh