Unable to Block Addresses or Domains - Time Warner Internet

This question is about "Unable to Block Addresses or Domains", with Time Warner Cable internet and apps. In the last 3 months I've received more spam than I have in my life!

I've had RoadRunner for over 10 years and nary a problem.

I'm receiving all this spam and am trying to block the senders but it says,

"Unable to save Blocked Senders."

Anyone know what I'm doing wrong? Thank you.

Unable to Block Addresses or Domains?