Build errors

Well uhh I don't know what that means but please help

Here is the whole console:

Executing Gradle task: build
Build info: MCreator 2020.2.14217, 1.12.2, 64-bit, 4005 MB, Windows 10, JVM 1.8.0_232, JAVA_HOME: C:\Program Files\Pylo\MCreator\jdk
This mapping 'snapshot_20171003' was designed for MC 1.12! Use at your own peril.
:deobfCompileDummyTask
:deobfProvidedDummyTask
:sourceApiJava UP-TO-DATE
:compileApiJava NO-SOURCE
:processApiResources NO-SOURCE
:apiClasses UP-TO-DATE
:sourceMainJava UP-TO-DATE

\This is the important part VVVV/

____________________________________________________________________________________________________________________
C:\Users\ziemn\MCreatorWorkspaces\idk\build\sources\main\java\net\mcreator\idk\world\WorldCheesedim.java:1052: error: cannot find symbol                         iblockstate1 = iblockstate1.getValue(BlockSand.VARIANT) == BlockSand.EnumType.RED_SAND ? STONE2 : STONE2;
                                                                      ^
  symbol:   variable VARIANT
  location: class BlockSand
C:\Users\ziemn\MCreatorWorkspaces\idk\build\sources\main\java\net\mcreator\idk\world\WorldCheesedim.java:1052: error: cannot find symbol                         iblockstate1 = iblockstate1.getValue(BlockSand.VARIANT) == BlockSand.EnumType.RED_SAND ? STONE2 : STONE2;
                                                                                            ^
  symbol:   variable EnumType
  location: class BlockSand
C:\Users\ziemn\MCreatorWorkspaces\idk\build\sources\main\java\net\mcreator\idk\world\WorldCraftingtabledimension.java:1085: error: cannot find symbol                         iblockstate1 = iblockstate1.getValue(BlockSand.VARIANT) == BlockSand.EnumType.RED_SAND ? STONE2 : STONE2;
                                                                      ^
  symbol:   variable VARIANT
  location: class BlockSand
C:\Users\ziemn\MCreatorWorkspaces\idk\build\sources\main\java\net\mcreator\idk\world\WorldCraftingtabledimension.java:1085: error: cannot find symbol                         iblockstate1 = iblockstate1.getValue(BlockSand.VARIANT) == BlockSand.EnumType.RED_SAND ? STONE2 : STONE2;
                                                                                            ^
  symbol:   variable EnumType
  location: class BlockSand

_______________________________________________________________________________________________________________________________

4 errors
: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
BUILD FAILED in 10s
5 actionable tasks: 3 executed, 2 up-to-date
BUILD FAILED
Task completed in 15242 milliseconds