That's because Innersloth are no longer supporting the itch.io version of the game, and expecting everyone to move to Steam (in spite of that having been a known health hazard for some of us for ovr a year and a half)
No, it's specifically since the client came out of beta, which happened at the end of October of 2019. Look at the dates, the first topic was November 2019, and the more recent one specifically notes that it's for the new library, NOT for the beta branch of it. Any posts in what SHOULD be the appropriate space have been deleted or merged with the ones in the beta forums though, because like Valve themselves, Steam's moderators are going out of their way to avoid conversations on the topic.