Can't Access My Drive

I can get all the way to enter my network password and then it tells me the program has been blocked because of an expired or not yet vaild certificate from running.  Java is up to date.  Anything else I am doing wrong?  This is happening with Chrome.  If I try and use Explorer to access it, it just take me to the Oracle website site.  I am so confused.  Suggestions??

Open the java settings and change the security slider to medium.

That worked - thank you! 

But should I be concerned with the risk of doing that?