1.16.5 Server keeps crashing

Keep getting the same error, when I join the world, it loads one chunk then server freezes and nothing else loads, I even tried moving a copy of the world over to a newer server, still same crash.

too many items, you can set a load/save limit in paper.yml

i thought that would be the cause but i issued a /kill @e [type=item] command and it seemed to have went through, but ill try ur solution.

i seem to be getting the same results

is there anything else i can do ?

nvm i fixed it, i used ClearLag plugin, and issued the laggclear command before it started crashing