Proseries website says WI fiduciary ready to file but this a.m. on the phone they said not until March 21 at the earliest

"When will this problem be resolved? "
" but this a.m. on the phone they said not until March 21 at the earliest:"

Sounds like they gave you an answer over the phone.

Get the K-1s out to the beneficiaries so they can file their returns, and hit the EFile button when it becomes available.