can't build a package. but why?

Thank you very much!, that has already been very helpful.
Now he is making progress compared to before.
However, he starts to encounter a problem again at a point where there is an asset that was in the scene but has been completely deleted from the content and the level.
So, it can no longer be found in the project, but he still wants to include it… why?

log all.txt (257.5 KB)
log yellow.txt (5.7 KB)