I see that the best solution would be if InterSystems would make this package available as an open source, with an option to upgrade any existing instance with the open-source version by using IPM for instance

In this case, any team that keeps using ZEN may provide their thoughts on how the modern ZEN should look in the form of PullRequests. There would be a place to post bugs and feature requests, which some community members may help to solve for everyone.

GZIP format itself does not support files, it's just a compress, usually it can be used with TAR format, which helps to merge multiple files, which can be compressed by GZIP

Look at my project isc-tar, which implements an internal way of creating cross-platform archives without calling external archivers.

https://openexchange.intersystems.com/package/isc-tar

In your log I see

 03/09/24-21:16:24:072 (430) 3 [Generic.Event] Process 430 (JobType=WRTDMN,Dumpstyle=0,Directory='/usr/iriss
ys/mgr/') caught signal 4.

caught signal 4. Googled, what this signal mean

4SIGILL Illegal instruction. The program contained some machine code the CPU can't understand.

i5-3470  quite an old CPU, from 2012, looks like it's not supported already