Framework: can't access PR dashboard, insecure connection?

Created by: jhux2

@trilinos/framework

I can't access the PR dashboard, starting sometime on 3/21/2019. The URL is https://testing-vm.sandia.gov/cdash/index.php?project=Trilinos&filtercount=1&showfilters=1&field1=buildname&compare1=65&value1=PR-, and until yesterday, it worked fine.