Minecraft just updated their version to 1.20.5 but Autcraft is still using version 1.20.4. This means that your launcher may be loading the update now and not let you connect to Autcraft.

To fix this, you will have to choose the proper version in your launcher when you load the game. Make sure you choose 1.20.4.

For instructions on how to do this, see: https://help.minecraft.net/hc/en-us/articles/360034754852-Change-Game-Version-for-Minecraft-Java-Edition

We will be adding a plugin which will allow people using 1.20.5 to connect as soon as it's available, however, due to the complexity in this new update, it may take some time.

Also, yes, Autcraft will update to 1.20.5 as soon as we can but again, it may take a while simply because the 1.20.5 update is so massive. Seriously, there's a lot. Go to this page of update information and scroll down... all the way down:
https://www.minecraft.net/en-us/article/minecraft-java-edition-1-20-5

So for now, please load your game in version 1.20.4 so that you can connect to Autcraft. We'll update the server to 1.20.5 as soon as we can.

will we ever update to the latest version or are we stuck in the 20.4 version?

Yes, the server has been updating ever since 1.5.2. It just takes time.

PaperMC (the server software we use) only just updated to 1.20.6 today. Which means it's not entirely bug free yet. Which also means now the plugins can start to update.

So we will update, but we can't just update the day that 1.20.6 is released by Mojang.

I really like the new versions and features they bring but oh boy is it a tedious task getting the server consistent with Minecraft.

Likewise, just like what AF said, stick to 1.20.4 through Minecraft Launcher, and you'll be good to go. (For me, I like sticking to Prism Launcher. 0: }

AutismFather:

Yes, the server has been updating ever since 1.5.2. It just takes time.

PaperMC (the server software we use) only just updated to 1.20.6 today. Which means it's not entirely bug free yet. Which also means now the plugins can start to update.

So we will update, but we can't just update the day that 1.20.6 is released by Mojang.

does that mean we get the new blocks?

subarahero123:

AutismFather:

Yes, the server has been updating ever since 1.5.2. It just takes time.

PaperMC (the server software we use) only just updated to 1.20.6 today. Which means it's not entirely bug free yet. Which also means now the plugins can start to update.

So we will update, but we can't just update the day that 1.20.6 is released by Mojang.

does that mean we get the new blocks?

no,the plugins are following the update

subarahero123:

AutismFather:

Yes, the server has been updating ever since 1.5.2. It just takes time.

PaperMC (the server software we use) only just updated to 1.20.6 today. Which means it's not entirely bug free yet. Which also means now the plugins can start to update.

So we will update, but we can't just update the day that 1.20.6 is released by Mojang.

does that mean we get the new blocks?

There are no new blocks in 1.20.6. There's the armadillo and wolf armor variants. The new blocks from the trial chambers will be in 1.21 which Mojang hasn't even announced the release date for.

we got a launch date! june 13

so we just waiting on the plugins now?

yup