I/O error on outbound calls – FreedomPop: Calling & Texting Review

For the last 72 hours any outbound call as failed to dial with a reason of I/O error. Text my brother and sister-in-law who also use Freedompop and they too got the same I/O error. We all us iPhones. I also see two reviews here and one post in the forums about this issue but have yet to see a reply from anyone at Freedompop. Could we get an update on what is happening and ETA on a resolution? May 18, 2019 I/O errors again. What is causing these issues?
Review by 000111Alexander on FreedomPop: Calling & Texting.