Entity not working

Executing Gradle task: build
Build info: MCreator 2020.2.14217, 1.14.4, 64-bit, 8190 MB, Windows 10, JVM 1.8.0_232, JAVA_HOME: C:\MCreator\jdk
> Configure project :
New Dep: net.minecraftforge:forge:1.14.4-28.2.3_mapped_snapshot_20190719-1.14.3
> Task :compileJava
C:\Users\kids\MCreatorWorkspaces\shadowsofinfinity\src\main\java\net\mcreator\shadowsofinfinity\entity\WhisperEntity.java:312: error: cannot find symbol       public void render(MatrixStack matrixStack, IVertexBuilder buffer, int packedLight, int packedOverlay, float red, float green, float blue,
                         ^
  symbol:   class MatrixStack
  location: class Modelwhispermob
C:\Users\kids\MCreatorWorkspaces\shadowsofinfinity\src\main\java\net\mcreator\shadowsofinfinity\entity\WhisperEntity.java:312: error: cannot find symbol       public void render(MatrixStack matrixStack, IVertexBuilder buffer, int packedLight, int packedOverlay, float red, float green, float blue,
                                                  ^
  symbol:   class IVertexBuilder
  location: class Modelwhispermob
2 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 5.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/4.9/userguide/command_line_interface.html#sec:c…
BUILD FAILED in 20s
1 actionable task: 1 executed
BUILD FAILED
Task completed in 26841 milliseconds

Can anyone help me with this? The mob worked before, but then I rotated the model 180 degrees to fix it, and now it doesn't work! HELP!