Minecraft v1.16.4
Forge v35.1.36
Aquaculture v2.1.12

Hello.
When entering my server I get this message:
https://prnt.sc/wmc1vx

Here is my console clipping:
https://pastebin.com/5Mjdwcpv

please help

I'm fairly certain that this is an incompatibility issue with Sponge and Forge.

Sponge is not installed

Could you provide your client log too, when that happens?

latest.log
@GirafiStudios

You're running in offline mode, which means you most likely don't have a valid account.
We do not provide any sort of support in those such cases.