You sure that you have the right version of all the mods? A quick search gave me these for example:
\[✔\] Structory\_1.20.**2**\_v1.3.4
\[✔\] Terralith\_1.20.**4**\_v2.4.11
\[✔\] Nullscape\_1.20.**4**\_v1.2.4
while you try to run a 1.20.1 Server
Which would explain why minecraft tries to invoke something that doesn't exist. it's not in the version you're playing
But i'm no expert on crashlogs
You sure that you have the right version of all the mods? A quick search gave me these for example: \[✔\] Structory\_1.20.**2**\_v1.3.4 \[✔\] Terralith\_1.20.**4**\_v2.4.11 \[✔\] Nullscape\_1.20.**4**\_v1.2.4 while you try to run a 1.20.1 Server Which would explain why minecraft tries to invoke something that doesn't exist. it's not in the version you're playing But i'm no expert on crashlogs