I've replicated the issue from the web page, Error 500.
So, I rolled back and then apply from the shell. This time, it works.
In order, to make it works:
From the scripts folder,
# sudo -u www-data php update_cli.php
Updating ff80a3db3..0390b1bc2
Fast-forward
CHANGELOG.md | 62 +
admin_role.php | 30 +-
admin_settings_company.php | 21 +-
admin_settings_default.php | 22 -Regards
…
create mode 100644 plugins/intl-tel-input/js/utils.js
create mode 100644 report_time_by_tech.php
delete mode 100644 temp_bulk_close_bugfix.php
Update successful
# sudo -u www-data php update_cli.php --update_db
Database updated from version 1.8.7 to 1.8.8.
The latest database version is 2.1.2.
# sudo -u www-data php update_cli.php --update_db
Database updated from version 1.8.8 to 1.8.9.
The latest database version is 2.1.2.
# sudo -u www-data php update_cli.php --update_db
Database updated from version 1.8.9 to 1.9.0.
The latest database version is 2.1.2.
…
# Run this command until it displays "Database is already at the latest version (2.1.2). No updates were applied.

Best regards! :-)