Custom Entities not working.

Im trying to make a mob but it pops up with an error message when I finish it and try to build it. It has a custom model and texture (model from blockbench) Here is the error message:

modelRenderer.zRot = z;
^
symbol: variable zRot
location: variable modelRenderer of type net.minecraft.client.renderer.model.ModelRenderer
15 errors
> Task :compileJava FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':compileJava'.
> Compilation failed; see the compiler error output for details.
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
Deprecated Gradle features were used in this build, making it incompatible with Gradle 8.0.
You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.
See https://docs.gradle.org/7.1.1/userguide/command_line_interface.html#sec…
BUILD FAILED in 19s
1 actionable task: 1 executed
BUILD FAILED
Task completed in 23 seconds