No, Loop Quantum Gravity has not been shown to violate the Holographic Principle

Didn't fly.

Tl;dr: The claim in the paper is just wrong. Read on if you want to know why it matters.
Several people asked me for comments on a recent paper that appeared on the arxiv, �Violation of the Holographic Principle in the Loop Quantum Gravity� by Ozan Sargin and Mir Faizal. We have met Mir Faizal before; he is the one who explained that the LHC would make contact to parallel universes