REQUIRED for all errors and issues:
a) GATK version used: 4.2.5.0
b) Exact command used: gatk CNNScoreVariants I "/path/to/directory/sample.bam" -V "/path/to/directory/sample.g.vcf.gz" -R "/path/to/directory/reference_genome.genomic.fa" -O "/path/to/directory/sample.vcf" -tensor-type read-tensor
c) Entire program log: Using GATK jar /path/to/directory/gatk-4.2.5.0/gatk-package-4.2.5.0-local.jar
Running:
    java -Dsamjdk.use_async_io_read_samtools=false -Dsamjdk.use_async_io_write_samtools=true -Dsamjdk.use_async_io_write_tribble=false -Dsamjdk.compression_level=2 -jar /path/to/directory/gatk-4.2.5.0/gatk-package-4.2.5.0-local.jar CNNScoreVariants -I /path/to/directory/sample.bam -V /path/to/directory/sample.g.vcf.gz -R /path/to/directory/reference_genome.genomic.fa -O /path/to/direcotry/sample.vcf -tensor-type read_tensor
Error: Invalid or corrupt jarfile /path/to/directory/gatk-4.2.5.0/gatk-package-4.2.5.0-local.jar

I'm running this in the GATK environment that came with my version, but when I check the java version I see java version "1.7.0_261"
OpenJDK Runtime Environment (rhel-2.6.22.2.el7_8-x86_64 u261-b02)
OpenJDK 64-Bit Server VM (build 24.261-b02, mixed mode)
See forum topic details at forum guidelines page: https://gatk.broadinstitute.org/hc/en-us/articles/360053845952-Forum-Guidelines

So I update to java 1.8 (still in the gatk environment)

java version "1.8.0_321"
Java(TM) SE Runtime Environment (build 1.8.0_321-b07)
Java HotSpot(TM) 64-Bit Server VM (build 25.321-b07, mixed mode)

and I get the following error: 

Running:
    java -Dsamjdk.use_async_io_read_samtools=false -Dsamjdk.use_async_io_write_samtools=true -Dsamjdk.use_async_io_write_tribble=false -Dsamjdk.compression_level=2 -jar /path/to/directory/gatk-4.2.5.0/gatk-package-4.2.5.0-local.jar CNNScoreVariants -I /path/to/directory/sample.bam -V /path/to/directory/sample.g.vcf.gz -R /path/to/directory/reference_genome.genomic.fa -O /path/to/direcotry/sample.vcf -tensor-type read_tensor
12:38:56.521 INFO  NativeLibraryLoader - Loading libgkl_compression.so from jar:file:/path/to/directory/gatk-4.2.5.0/gatk-package-4.2.5.0-local.jar!/com/intel/gkl/native/libgkl_compression.so
Apr 12, 2022 12:38:56 PM shaded.cloud_nio.com.google.auth.oauth2.ComputeEngineCredentials runningOnComputeEngine
INFO: Failed to detect whether we are running on Google Compute Engine.
12:38:56.699 INFO  CNNScoreVariants - ------------------------------------------------------------
12:38:56.699 INFO  CNNScoreVariants - The Genome Analysis Toolkit (GATK) v4.2.5.0
12:38:56.699 INFO  CNNScoreVariants - For support and documentation go to https://software.broadinstitute.org/gatk/
12:38:56.699 INFO  CNNScoreVariants - Executing as user@server on Linux v3.10.0-1160.24.1.el7.x86_64 amd64
12:38:56.699 INFO  CNNScoreVariants - Java runtime: OpenJDK 64-Bit Server VM v1.8.0_152-release-1056-b12
12:38:56.700 INFO  CNNScoreVariants - Start Date/Time: April 12, 2022 12:38:56 PM CDT
12:38:56.700 INFO  CNNScoreVariants - ------------------------------------------------------------
12:38:56.700 INFO  CNNScoreVariants - ------------------------------------------------------------
12:38:56.700 INFO  CNNScoreVariants - HTSJDK Version: 2.24.1
12:38:56.700 INFO  CNNScoreVariants - Picard Version: 2.25.4
12:38:56.700 INFO  CNNScoreVariants - Built for Spark Version: 2.4.5
12:38:56.701 INFO  CNNScoreVariants - HTSJDK Defaults.COMPRESSION_LEVEL : 2
12:38:56.701 INFO  CNNScoreVariants - HTSJDK Defaults.USE_ASYNC_IO_READ_FOR_SAMTOOLS : false
12:38:56.701 INFO  CNNScoreVariants - HTSJDK Defaults.USE_ASYNC_IO_WRITE_FOR_SAMTOOLS : true
12:38:56.701 INFO  CNNScoreVariants - HTSJDK Defaults.USE_ASYNC_IO_WRITE_FOR_TRIBBLE : false
12:38:56.701 INFO  CNNScoreVariants - Deflater: IntelDeflater
12:38:56.701 INFO  CNNScoreVariants - Inflater: IntelInflater
12:38:56.701 INFO  CNNScoreVariants - GCS max retries/reopens: 20
12:38:56.701 INFO  CNNScoreVariants - Requester pays: disabled
12:38:56.701 INFO  CNNScoreVariants - Initializing engine
12:38:58.621 INFO  FeatureManager - Using codec VCFCodec to read file file:///path/to/directory/sample.g.vcf.gz
12:38:59.774 INFO  CNNScoreVariants - Done initializing engine
12:38:59.775 INFO  NativeLibraryLoader - Loading libgkl_utils.so from jar:file:/path/to/directory/gatk-4.2.5.0/gatk-package-4.2.5.0-local.jar!/com/intel/gkl/native/libgkl_utils.so
12:38:59.812 INFO  CNNScoreVariants - Done scoring variants with CNN.
12:38:59.812 INFO  CNNScoreVariants - Shutting down engine
[April 12, 2022 12:38:59 PM CDT] org.broadinstitute.hellbender.tools.walkers.vqsr.CNNScoreVariants done. Elapsed time: 0.06 minutes.
Runtime.totalMemory()=2559574016
java.lang.RuntimeException: A required Python package ("gatktool") could not be imported into the Python environment. This tool requires that the GATK Python environment is properly established and activated. Please refer to GATK README.md file for instructions on setting up the GATK Python environment.
        at org.broadinstitute.hellbender.utils.python.PythonScriptExecutor.checkPythonEnvironmentForPackage(PythonScriptExecutor.java:228)
        at org.broadinstitute.hellbender.utils.python.StreamingPythonScriptExecutor.start(StreamingPythonScriptExecutor.java:121)
        at org.broadinstitute.hellbender.tools.walkers.vqsr.CNNScoreVariants.onTraversalStart(CNNScoreVariants.java:297)
        at org.broadinstitute.hellbender.engine.GATKTool.doWork(GATKTool.java:1083)
        at org.broadinstitute.hellbender.cmdline.CommandLineProgram.runTool(CommandLineProgram.java:140)
        at org.broadinstitute.hellbender.cmdline.CommandLineProgram.instanceMainPostParseArgs(CommandLineProgram.java:192)
        at org.broadinstitute.hellbender.cmdline.CommandLineProgram.instanceMain(CommandLineProgram.java:211)
        at org.broadinstitute.hellbender.Main.runCommandLineProgram(Main.java:160)
        at org.broadinstitute.hellbender.Main.mainEntry(Main.java:203)
        at org.broadinstitute.hellbender.Main.main(Main.java:289)
Caused by: org.broadinstitute.hellbender.utils.python.PythonScriptExecutorException:
python exited with 1
Command Line: python -c import gatktool

Stdout:
Stderr: Traceback (most recent call last):
  File "<string>", line 1, in <module>
ModuleNotFoundError: No module named 'gatktool'

        at org.broadinstitute.hellbender.utils.python.PythonExecutorBase.getScriptException(PythonExecutorBase.java:75)
        at org.broadinstitute.hellbender.utils.runtime.ScriptExecutor.executeCuratedArgs(ScriptExecutor.java:112)
        at org.broadinstitute.hellbender.utils.python.PythonScriptExecutor.executeArgs(PythonScriptExecutor.java:193)
        at org.broadinstitute.hellbender.utils.python.PythonScriptExecutor.executeCommand(PythonScriptExecutor.java:78)
        at org.broadinstitute.hellbender.utils.python.PythonScriptExecutor.checkPythonEnvironmentForPackage(PythonScriptExecutor.java:221)
        ... 9 more

I tired different things and nothing worked until I just recreated the environment with a different name. I still had to update the Java version to 1.8, but it's finally working. Any idea why I have to manually update the Java version though?