Incompatible FML modded server error and missing files in Files section

Hey, it's my first time making a server via aternos or such a platform.

I was trying to download Life In The Village 2 mod pack, but can't seem to figure out how to do it.
I got to software section -> Modpacks -> download the modpack -> launch the server
But when I want to join I can't and a red X appears under Ping icon saying "Incompatible FML modded server"
What's more in the Files section, no files that would have anything to do with modding are downloaded, not even an empty Mods folder is there.

Now I don't know if it's just not showing up on the site, as in Logs I can see server loading files of the mods, but I keep getting this error nonstop.
It's not a new issue, I know, I tried downloading the mod pack via a different browser, I tried downloading different mod pack versions for my client, but nothing works, and tho both the server and my launcher CLAIMS to be downloading 1.26 version of the mod pack, I still get Incompatible FML modded server error.

I get this message

Quote from Sariel

Check your Minecraft username, it must not be longer than 16 characters and also not containing any special characters except _

I fixed my name, still getting red X, but now the message changed to this

And yes, I did try to restart and try again.

Quote from Sariel

Check your Minecraft username, it must not be longer than 16 characters and also not containing any special characters except _

nvrm, I found the issue, and now the server works. Thank you for your help!

Now that I'm in tho, I can see 3 Ram limit is a problem as every mobs movement is stuttering.