Uploaded version 20 of Ubuntu and built Cinelerra on it without any problems that we could see right away.  A static tar is available at:
   https://cinelerra-gg.org/download/testing/cinelerra-5.1-ub20-x86_64.static.txz
If anyone has time to test and finds a problem, please let us know.  To compile Cinelerra, we first had to install Python as it was not included with the install.