Problem installing Elasticsearch-8.11.1 with Snowstorm-10.4.2.jar

[FilipTNH]

Elasticsearch 8.11.1(with built-in java environment) installs and launches fine (with xpack.security.enabled: false) after increasing vm.max_map_count as requested in log at startup.
Running Snowstorm.jar (using Java 17.0.12) gives a series of warnings on BeanPostProcessor + warning 'cannot find template location: classpath:/templates/' + info 'error parsing HTTP request header'. Starting RF2 SNAPSHOT import on branch MAIN runs as expected for a while but then Snowstorm crashes with no clear indication in the log file. After restarting Snowstorm, you find a blocked MAIN branche with partial upload.
Any idea what might go wrong and how this can be fixed?

FYI - Installing ES7.10.2 and Snowstorm 9.2.0 on another machine and uploading INT goes smoothly.