check the entity numbers for the actions. if a bot has an active goal with an invalid entity number, it causes a crash. unfortunately Mal didn't get to the exception handling for this.
If you are just renaming the existing goldrush navs, it's highly likely that this will happen because I have added some entities to the original goldrush map via ET Pro map script support.
if you give me a link to that version of goldrush, I'll set up the map script as an example for you to be able to use in the future. Without the created entities, the map flow will be broken even if the entity numbers are correct.
There is also a general troubleshooting section of the Wiki
here