Error Code 123:259a6556
Be aware that the error number you get is important in it’s whole length. If you have different code, your issue is different from this one and might be mod related.
List with other codes can be found here: Load Errors
More information about loading errors can be found here: Loading a family just reloads the map
This error is caused by outdated Mods. Please update your mods to the newest version or remove them if they are no longer compatible.