Using the latest official VM from
https://musicbrainz.org/doc/MusicBrainz_Server/Setup

and patched it with the instructions and comments here:
https://blog.musicbrainz.org/2017/05/16/schema-change-release-2017-05-15-including-upgrade-instructions/

I don't get the "server.js" running. The last errorline is:
musicbrainz_1 | Use of uninitialized value in numeric eq (==) at /usr/local/share/perl/5.22.1/Parallel/Prefork.pm line 98.
The complete actual output is attached.

Hint:
The database itself is up-to-date and replicated until 22.5.2017, 17.00 GMT. I get JSON results as expected, the search index works as expected. Only the local webserver (server.js) seems not to work.
I only get a "502 Bad Gateway nginx/1.10.0 (Ubuntu)" in the local browser.

The WEB_SERVER variable in lib/DBDefs.pm is set to the used local IP address 192.168.1.172:5000

What can I do?