Update! After restarting the engine and packing a few more times, I managed to get that UTAHelper message along with the error -
UATHelper: Packaging (Windows (64-bit)): C:/Program Files/Epic Games/UE_4.26/Engine/Plugins/Marketplace/ProceduralAnimationFramework/Source/ProceduralAnimationFramework/Public/ProceduralMovementComponent.h(75) : LogCompile: Error: An explicit Category specifier is required for Blueprint accessible functions in an Engine module.
UATHelper: Packaging (Windows (64-bit)): C:/Program Files/Epic Games/UE_4.26/Engine/Plugins/Marketplace/ProceduralAnimationFramework/Source/ProceduralAnimationFramework/Public/ProceduralMovementComponent.h(77) : LogCompile: Error: An explicit Category specifier is required for Blueprint accessible functions in an Engine module.
UATHelper: Packaging (Windows (64-bit)): C:/Program Files/Epic Games/UE_4.26/Engine/Plugins/Marketplace/ProceduralAnimationFramework/Source/ProceduralAnimationFramework/Public/ProceduralMovementComponent.h(79) : LogCompile: Error: An explicit Category specifier is required for Blueprint accessible functions in an Engine module.
UATHelper: Packaging (Windows (64-bit)): C:/Program Files/Epic Games/UE_4.26/Engine/Plugins/Marketplace/ProceduralAnimationFramework/Source/ProceduralAnimationFramework/Public/ProceduralMovementComponent.h(81) : LogCompile: Error: An explicit Category specifier is required for Blueprint accessible functions in an Engine module.
PackagingResults: Error: An explicit Category specifier is required for Blueprint accessible functions in an Engine module.
PackagingResults: Error: An explicit Category specifier is required for Blueprint accessible functions in an Engine module.
PackagingResults: Error: An explicit Category specifier is required for Blueprint accessible functions in an Engine module.
PackagingResults: Error: An explicit Category specifier is required for Blueprint accessible functions in an Engine module.