Thank You, will do that.
But, the issue is not "invalid", it is most very valid and has been reported by how many people? The problem here is, which channel it was reported to. Proper terminology is key to a successful Jira ticket, or at least that's what've I've been trying to do at work, for years.
I too am running a vanilla server. 1.17 was fine, updated to 1.18 today and now all three of us are seeing the same error. On three different laptops when trying to connect. This is not fixed, at least admit it's not, follow up with your users with a quick message and we're good.