General Relativity is Maxwell's Equations with Time taken independent of Space into a 4th dimension. Gravity is mass bending Time, having absolutely nothing to do with the "warping of Space". Time expands and contracts Space, that is to say, if there is no Time in the space between two points they are touching; also called an Einstein-Rosen bridge. It was trivial to measure the 1.61 arc second deflection of light in the photographs.
The far more difficult part of the process was presenting GR to the Nobel Committee and Einstein's eventual capitulation and the substitution of the imaginary photon for GR, in order for Einstein to pay off his divorce settlement with his first wife. Then in the 1930's what Einstein referred to as "boundless stupid" was funded by the Nobel Committee, ie black holes and dark matter.
Re: “Einstein, Newton and the Eclipse of 1919”
The problem with General Relativity is political, not scientific.