It could be one asset is causing it to hang long enough to fail, the error is a communication issue, the rest just come back as errors because they didn’t get processed.
Here’s similar posts, the second one may help, it seems there is a certain process for getting a playset to be properly referenced from the main project.
type in one of the names from one of assets from the loaderror like W2SVDLETO6NIFASOY4VVR0 into the content browser to see if it points to the prefab it’s a part of.
Then see if following @fania4life’s instructions from the second post to put it back in your level