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Looks like you need to expand the payload to include more (all) of the parameters (including the cookies, specifically the ASP.NET_SessionId).

Go to anaconda cmd or miniconda cmd and put this

Since the error is caused by keras in particular, I replaced it with tensorflow.keras.* and seemed to resolve the issue.

Updating your Python version should fix the issue. I experienced the same problem until I updated to Python 3.10.2

Finally, I succeeded so let me share what I learned for future reference in case anyone else would later on struggle with Apache Spark installation as well. There are three crucial aspects when installing Apache Spark on a Windows 10 machine.

1. Make sure you have Java 8 installed! Many of us fall into the trap of downloading the now-default Java 17 which is not supported by Apache Spark. There is an option to choose between either Java 8 or Java 11 but based on the discussion on this thread, I concluded that for my quick POC examples it's not worth all that trouble with Java 11 JDK and JRE, hence I went with the Java 8 for which both JDK and JRE were easily downloadable from the Oracle website. Note that the later version you choose, the more secure it will be, so for anything more serious I'd probably opt for the Java 11.

2. Move the newly installed Java folders to C drive. Create a C:\jdk folder for the Java 8 JDK and C:\jre for he Java 8 JRE. Then, there won't be a need for a JAVA_HOME environmental variable since they are both right in the base of the C drive.

3. Use an older version of Spark! As it turned out, the latest stable release, 3.2.0 from October 2021 that is currently offered on the Apache Spark website has been repeatedly reported to provide such and other similar issues when initializing the Spark Context. As such, I tried rolling back to a previous version. Specifically, I downloaded Apache Spark version 3.0.3 released in June 2021 and pointed the SPARK_HOME environmental variable to the newly extracted folder at: C:\Spark\spark-3.0.3-bin-hadoop2.7

After all these modifications, I closed all command line windows, opened a fresh one, ran spark-shell and finally I am getting the so much sought after welcome screen of Spark:

Git For Windows 2.33.1 comes with OpenSSH 8.8 which disables RSA signatures using the SHA-1 hash algorithm by default.

For most users, this change should be invisible and there is no need to replace ssh-rsa keys.
OpenSSH has supported RFC8332 RSA/SHA-256/512 signatures since release 7.2 and existing ssh-rsa keys will automatically use the stronger algorithm where possible.

Incompatibility is more likely when connecting to older SSH implementations that have not been upgraded or have not closely tracked improvements in the SSH protocol.

For these cases, it may be necessary to selectively re-enable RSA/SHA1 to allow connection and/or user authentication via the HostkeyAlgorithms and PubkeyAcceptedAlgorithms options.
For example, the following stanza in ~/.ssh/config will enable RSA/SHA1 for host and user authentication for a single destination host:

Replace

To get rid of the first error I'd found (and posted about in the OP), I had to go to the $HIVE_HOME/lib directory and remove this old guava library file: guava-19.0.jar

I had to make sure that the guava library I'd copied from the Hadoop library was there: guava-27.0-jre.jar

On the next attempt I got a different error: