Updated the server today so you may need to start using the newest client as well. So what’s new in 19.1.3? You can get the full list here: https://www.minecraft.net/en-us/article/minecraft-java-edition-1-19-3

Highlights

• Some experimental features are now available through built-in experimental datapacks
• Added new default skins for offline players
• The Vex now has a new look
• In the Nether dimension Endermen, Skeletons and Wither Skeletons now only spawn at light level 7 and below (instead of 11 and below)
• Numerous changes to Creative Inventory ordering & contents
• Added new Spawn Egg items for Ender Dragon, Iron Golem, Snow Golem and Wither mobs to Creative mode
• Added Draft Player Reports
• Added new fillbiome command & sub-commands execute if|unless biome
• Added new Telemetry Events
• New gamerules: blockExplosionDropDecay, mobExplosionDropDecay, tntExplosionDropDecay, snowAccumulationHeight, waterSourceConversion, lavaSourceConversion, globalSoundEvents

Experimental Features

• Added Camels, 2 players can ride, too high for most mobs to get, walk over fenses
• Added new bamboo wood set
• Added Chiseled Bookshelves
• Added Bundles
• Added Hanging Signs
• When placing a Mob Head on a Note Block, that Note Block will now play one of the ambient sounds of that mob when played by a player or powered by Redstone
• Added Piglin Heads