Dev Error 1121 after getting passed BLZBNTBNA00000015 error

so after managing to somehow get passed the BLZBNTBNA00000015 error. I’m not getting the error in the title. Can anyone assist?

The video is in Spanish, but if you follow the steps you will solve it

What steps did you take, if any, that allowed you to get passed that specific error?

i got dll errors after getting passed this… so not sure lmao