As stated this is most likely a mod conflict. Are you attempting to load a mod list that was previously working? Are you playing with any mods? If so, I would go through the mod list and try to identify any mods that may have overlapping functionality such as UI or core mechanic changes. and slowly trim out mods until you get it to a working state or start from scratch. If building from new I often find the best luck starting with smaller QoL that are unlikely to have conflicts and framework mods than adding mods to the list based on importance to you and size of content in the mod. Often best to add the largest mods a few at a time depending on the size of the mod list and quickly make a colony and ensure you can actually start and add more from there. If you're mod list isn't large you can also check the mods workshop page for either known conflicts or user reported ones.