Challenge not yet complete in Shield Platform Encryption Whoops, looks like there was a problem. Please try again.

I really am exhausted because of this i don't the reason to the error & tried till i can't & now i can't. As i am doing this 

>>>Leads and Opportunities>Use Leads to Track Potential Customer

As you can see everything in the screenshot {i page screenshot it, so don't mind if it is issue to someone}.

please someone help me solving this error.

#Salesforce #Salesforce Developers #Salesforce Developer