Hey, when I am using Angel's Infinite Ores and Beyond (among others but I think its related to those 2), RSO will throw an error:
Error while running event on_chunk_generated (ID 12)
Unknown entity name: infinite-silicon-ore
stack traceback:
rso-mod/control.lua:691: in function 'spawn_resource_ore'
rso-mod/control.lua:1342: in function 'roll_chunk'
rso-mod/control.lua:1601: in function <rso-mod/control.lua:1588>

I might need to get all your mods since I can't reproduce it with only those two.
There needs to be some other mod thats causing RSO to think that this ore exists for some reason.
Can you post thread on the forums (link is on information page) with your set of mods and/or save if possible.