Unfortunately, it seems like you're getting this error due to the long size of the document, especially for relations:
One option could be to disable tokens (use --disable-patterns) you're not interested in, for example see the docs.
However, I suspect your document is still way too long.
I would love at least a work around to have line breaks in our interface, as we have line breaks in our documents, and they are significant for our purposes. I have seen newlines in relations annotation and it doesn't specifically help given that wrap breaks on us ! Is there any way to break lines on newline tokens ?
Why don't you write a pre-processing script for this?
For example, this Stack Overflow shows how to break up by new line characters this before using spaCy. You could combine this with this example:
So now your source (input) file would be text broken up by the new line character, so you can still use the rel.manual recipe.