SFM crashing after trying to render 2 maps (IMPORTANT)

[KUenon]

hey, everytime i use 2 maps and work with them and try to render, sfm crashes and if i open sfm again and try to do something on my project, it crashes again, i can't even save or delete the second map, how i added the second map? well, i used this video

https://www.youtube.com/watch?v=9xGpqRTOC14&t=99s

Please! help, this is important, and i need this project, i have been spending too much time on it!
Is there any way to delete or disable the map withoout crashing sfm?