rollback-altboot fails

[floion]

root@d8d7370:~# systemctl status rollback-altboot
● rollback-altboot.service - Balena rollback checks altboot
Loaded: loaded (/lib/systemd/system/rollback-altboot.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Wed 2022-02-09 14:08:46 UTC; 9min ago
Process: 878 ExecStart=/bin/sh /usr/bin/rollback-altboot (code=exited, status=1/FAILURE)
Main PID: 878 (code=exited, status=1/FAILURE)

Feb 09 14:08:46 localhost sh[878]: Rollback: Parsing bootloader configuration
Feb 09 14:08:46 localhost sh[878]: Rollback: Could not find upgrade_available variable in bootloader environment
Feb 09 14:08:46 localhost systemd[1]: rollback-altboot.service: Main process exited, code=exited, status=1/FAILURE
Feb 09 14:08:46 localhost systemd[1]: rollback-altboot.service: Failed with result 'exit-code'.
Feb 09 14:08:46 localhost systemd[1]: Failed to start Balena rollback checks altboot.