Error on R&Q's Endless server

I'm having an error trying to connect to my R&Q's Endless server. When I try to connect, I see the screenshot below that says I have some incompatible mods.

I'm not the first to have this exact error, someone else outlined this on the discord help server and there was another asking for help with this here but so far I haven't found a fix.

I also included the server-side log that was made when I tried to connect and it timed me out.

The modpack is on the ATLauncher, it's on version 0.80. Aternos doesn't specify which mod group we should install, so maybe that could be causing the problem? Whenever I've gotten this error in the past on other modpacks I just needed to update the pack or choose the right one or something, but my modpack is correct and up to date... I'm not really sure what to do.

Anyone know what's going on?

According to ATLauncher, I am. Version 0.80. But version 0.80 has a lot of different mod "groups". But both the server and my client are on 0.80, so I'm not sure what's wrong

Ah, I can't play the default. When I try it give me this.

I'm not really sure why. This is just when I start up the modpack. But, I can play when I put on one of the mod groups. Without modpacks, there's only libraries, and no real content mods... Except hats, I guess

Oh, dang... I was really looking forward to playing it. At least the buggy pack has been taken care of, then. Let's hope there's a way to play it on here in the future!