A mod is calling game code that moved
What causes it
A mod or plugin was compiled against a different Minecraft version, so a method it calls does not exist here.
How to fix it
The first mod or plugin class in the stack trace is the culprit. Install its build for this exact Minecraft and loader version.
Not sure this is your problem? Paste your log and Roastd will tell you which of these it actually matched, and what else it found.
Check your own log