We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:
https://discuss.afni.nimh.nih.gov
Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.
The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.
Oh, you are on Ubuntu 20. So try to the linux_ubuntu_16_64 package.
If this is an high-performane computing setup, maybe you will be okay. But if necessary, the top of the ubuntu 20 installation instructions mentions any prerequisite system packages.
Or actually, here is the sub-section explicitly listing the packages.