Error when installing core 13.0.123

Attempting to upgrade core to 13.0.123

Detected Missing Dependency of: core 13.0.123
Downloading Missing Dependency of: core 13.0.123
Processing core
Verifying local module download...Verified
Extracting...Done
Module core successfully downloaded
Installing Missing Dependency of: core 13.0.123
PHP Parse error:  syntax error, unexpected '[' in /var/www/html/admin/modules/core/functions.inc/Driver.class.php on line 9
Whoops\Exception\ErrorException: syntax error, unexpected '[' in file /var/www/html/admin/modules/core/functions.inc/Driver.class.php on line 9
Stack trace:
  1. () /var/www/html/admin/modules/core/functions.inc/Driver.class.php:9
All upgrades done!
Updating Hooks...Done


  [Exception]
  Unable to locate the FreePBX BMO Class 'Core'A required module might be disabled or uninstalled. Recommended steps (run from the CLI): 1) fwconsole ma install core 2) fwconsole ma enable core

resolve by rolling back core:

fwconsole ma downloadinstall core --tag 13.0.122.60