I have an Acer Aspire E5-511 laptop. I am trying to install Ubuntu or Kubuntu, but after I do the updates it won't boot. It boots to a black screen with this message and the fan make noise:
[ 2.448950] Problem loading UEFI: db X.509 certificate (-65)
[ 2.449012] Problem loading UEFI: db X.509 certificate (-65)
[ 2.449111] Couldn't get size: 0x8000000000000000e