Mixed Content Issue

How can i fix this issue ?

I am using iFrame.

"Mixed Content: The page at ‘https://xxxxxxxxxxxx.xxxx/xxx.aspx’ was loaded over a secure connection, but contains a form which targets an insecure endpoint ‘http://xxxxxxxxxxxx.xxxx/xxx.aspx’. This endpoint should be made available over a secure connection.

Hey @nagenpresearch did you get a solution to your query ?