We are testing Eos3.3 on Mathematica 126.96.36.199, which is introduced on February 3, 2021. Even most basic command like HO[“A”,”B”] fails with an error message of Join. We are investigating the reason for the failure. For the moment please run Eos on Mathematica 12.1 or 11.
Mathemtica 11.3 on Ubuntu 19.04 does not work. It simply failed to display the welcome page, and aborted the computation. I looked at stackoverflow, and I can find similar phenomena in the Mathematica client side code. I later learned that Mathematica 12 seemed to jve solved the problem.