me and a friend was fighting Gaia when his 2nd phase happend he crashes both of us with "fatal error"
dunno if this is a know bug or has been fixed

that... isn't what i wanted. could you give the logs, please?

Could you give us a crashlog?

i cant find anything that could help when i look in the logs it just says we disconnected

[23:09:57] [Server thread/INFO]: tomownu21 lost connection: TextComponent{text='Disconnected', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}}
[23:09:57] [Server thread/INFO]: tomownu21 left the game
[23:09:57] [Server thread/INFO]: Lewisownu lost connection: TextComponent{text='Disconnected', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}}
[23:09:57] [Server thread/INFO]: Lewisownu left the game

he crashes both of us with "fatal error" by crash you mean crash to launcher or just disconnect from server ?
if there is a crash, edit your profile, hit the "open gamedirectory" button, enter the "crashlogs" folder, search for the relevant crashlog and attach it to your comment or post it via pastebin and submit a link to the pastebin entry (please do not textwall it here)

if it is only a disconnect, stop the server and close the clients, do the same as above (also enter the server folder), but this time enter the "logs" folder ... it contains a "latest.log" and several compressed logs ... search for the one with the timestamp matching your disconnect or if not present the latest.log and attach them to your comment (it helps if you clean up your logs folder before you start to reproduce the issue)

Can you reload the world?