Can you fix the bug for researching the Ion cannon? The technology lua file says it needs "energy-weapons-damage-6". This does not show up anywhere in the technology list to research.
https://www.dropbox.com/s/u5y7z4srprjtniv/Screenshot%202021-01-03%2000.34.03.png?dl=1
https://www.dropbox.com/s/slxsqy11vgbriic/Screenshot%202021-01-03%2000.34.22.png?dl=1

Everything in the technology tree prior to the ion cannon is researched. The only way to research it is to specifically use the game.player.force.technologies command on the above mentioned energy weapons damage tech to unlock it.

If you have problem with technologies, then you should check the mods you have.
Did you also try my update for 1.1? https://mods.factorio.com/mod/Kux-OrbitalIonCannon.