Use Error causes

We can slightly simplify code and improve shown errors by using the `cause` option of `Error` constructor.

Blocked by #1745. See https://github.com/shakacode/react_on_rails/pull/1745/files/521c5b3d3b1e99d483eb5cb0bbf34c50828743d1..654761635b4f39360a84d8cde1305bbee6b962b6#r2194213114 (and check all `new Error` calls). 