What's the name of this point? It's really hard to find any progress on this topic regarding Mochizuki other than some popular articles without any content.
See https://www.math.columbia.edu/~woit/wordpress/?p=10560, which links to a technical write-up by Scholze and Stix about what they think is the issue with Mochizuki's proof.
Woit's blogpost also gives a bit more links, including a response by Mochizuki.