How do I get rid of this?

I attached a screenshot of the error.
I know I can remove it somehow, to prevent it from coming up, but I forgot how ??? confused

Please help

Thanks...

 

Assuming you are using IE:

Go to Tool> Internet Options. Select the "Security" Tab and then click on the Custome Level button. Scroll down until you see "Display mixed content". Select the option "Enable". Click OK. You will get a Security Warning pop-up. Click Yes, then Click OK on the "Internet Options" window.

 

Thank you for your help.