Custom book, will not compile with custom book page GUI

Executing Gradle task: build
Build info: MCreator 2022.1.12711 EAP (12711), forge-1.18.2, 64-bit, 16332 MB, Windows 10, JVM 17.0.1, JAVA_HOME: C:\Users\uttpm\Documents\MCreatorEAP20221b12711\jdk, started on: 2022-04-03-18:41:35
 
> Configure project :
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> Task :compileJava FAILED
C:\Users\uttpm\MCreatorWorkspaces\advanced_explosives_rewritten\src\main\java\net\thebiggestaround\aerewritten\item\inventory\AdvancedExplosivesRRecipeBookInventoryCapability.java:31: error: incomparable types: Item and RegistryObject  if (event.getEntityItem().getItem().getItem() == AeRewrittenModItems.ADVANCED_EXPLOSIVES_R_RECIPE_BOOK) {
       ^
C:\Users\uttpm\MCreatorWorkspaces\advanced_explosives_rewritten\src\main\java\net\thebiggestaround\aerewritten\item\inventory\AdvancedExplosivesRRecipeBookInventoryCapability.java:64: error: incomparable types: Item and RegistryObject   return stack.getItem() != AeRewrittenModItems.ADVANCED_EXPLOSIVES_R_RECIPE_BOOK;
     ^
2 errors
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 1s
1 actionable task: 1 executed
 
BUILD FAILED
Task completed in 4 seconds

Perhaps the lack of slots in the GUI is causing problems? No matter if I set "Size of inventory (slot count):" to zero or any other number it does this.