Server is online but not in minecraft

I have a superflat 1.16.5 server that I use mods to build random things, I have world edit, chisels and bits, Wallpapercraft a fresh roll, Blockcarpentry and Adorn, everytime I place a bit from chiselsandbits the server gets a little bit laggy and now I can't join the server, cuz every time I start the server they turn online and when I try to join...

even with the server online.
I had another server before that I placed so many bits and the word crashed and I lost it, so I think the problem might be the chisels and bits mod

And I downloaded the world and..

Can someone help me please ? I don't wanna lose another world

btw minecraftt crashes when I try to join in the world on single player

here's the log the server got online I tried to join and I had the same problem, the intire log: https://mclo.gs/Sz0yf9R

nevermind, I removed world edit mod and I think it's working,I hope this problem don't comes back