hmm. not sure what method your using to go from blender to rct3. from the output it looks like something is messing up during export. based on the list of things that did export it is either something wrong with Green_cornflow or whatever object comes right after it. I would double check that object and the one after it for anything thats different about them. it looks like possibly something produced an invalid name string which caused the export script to to pass an empty string when it shouldnt. this then caused the script to try to access memory that isnt there. Could also be a bug in the exporter. is this error happening in the middle of processing objects or does it list all objects an then crash? tbh it could be a number of things. A more detailed explanation of what you are doing and when its failing could help but like I said im not sure about how your going about the export process and I personally dont have any experience in doing custom rides.
If you post more info maybe I can help but I cant make any promises, going on guesswork here 🫠. You may also try asking around for export help on any blender communities. maybe someone else has ran into this problem before. If you do figure it out please let us know, it might be helpful for someone else running into the same issues in the future.