Sounds like pop science, I don't think Einstein ever mentioned an interwoven fabric for space.can you explain what Einstein meant by an interwoven ''fabric'' or is this also just something ''pop science'' misinterpreted ?
The Higgs field and the Magnetic field don't have anything to do with General Relativity.In general relativity I personally know of two possible '''fabrics''
1. A speculative Higgs field
2. The Earths magnetic field