Hello I'm experiencing trouble joining my favorite Minecraft server

So on September 5th 2025 it was my birthday I played for a bit and then said I was going to play again tomorrow but then I got busy so on September 7th when I tried joining it gave me the error message version not supported unable to connect which was untrue because my version was always supported and there weren't no updates available I have tried everything the website said I've tried reporting it through emails and a lot more I don't know what to do can Minecraft support please fix this I've contacted the admins and they can't do anything about it they said that it's Mojangs problem and I'm crying because my friends miss me and they have no other way of contacting me unless they friend me on Minecraft but I would have to get my friend who can still play who's the only one I have added and I hope would actually tell to tell them to add me on it I'm experiencing so much trouble the server name is Eysever my username is Sheep3187 my friends might lose me forever if y'all don't fix this it's been a while I have tried uninstalling and reinstalling the app and a lot more please help me my version is 1.21.101