Errors when logging onto NWBC

I have two issues when logging into NWBC.

I'm connecting to my ECC DEV environment using http://myserver:8010/sap/bc/nwbc

when I first connect I get a message about an expired certificate

I'm not sure where to find this certificate to update the valid to date....

Then after saying yes... I get this error...

I've tried changing the Custom level in my internet options to allow mixed content - but it still gives this error message.

Any ideas?

Thanks!