For the error messages that relate to being unable to find an asset, as I’ve stated above you’ll need to find out where these are referenced in your project and remove these references to assets that don’t exist.
The log does a pretty good job of providing information regarding exactly what the error is, so you’ll just need to comb through it and make a note of which errors need fixing. It looked like a lot of the types of error messages were the same, so if you can fix one of them, you can go through and fix the others without much of an issue.
Have a great day