I think the key is to have a solid understanding of the story and characters. Make sure the plot and art are coherent and don't introduce sudden, confusing elements.
One reason could be corrupted game files. You can verify the integrity of the game files. If you got the game through a platform like Steam, there is usually an option to check for file integrity. If any files are corrupted, the platform will redownload them.
One common reason for crashing during the story in Guild Wars 2 is overheating. Check if your computer's cooling system is working properly. If the CPU or GPU gets too hot, the game may crash. Additionally, verify the integrity of the game files through the game launcher. Sometimes, corrupted files can lead to crashes.
Another possibility is some sort of strange space anomaly. It might have warped his ship's trajectory and sent him crashing down to Earth. This would open up a lot of interesting plot points, like how he'd adapt to Earth's technology and culture which are very different from what he's used to in the Star Wars galaxy.
It could be due to compatibility issues with your device or outdated game patches. Check for updates and make sure your device meets the game's requirements.