git-backup crash

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Describe the bug
Git-backup plugin crash.

Tip: to validate your setup was working with the previous version, use opnsense-revert (https://docs.opnsense.org/manual/opnsense_tools.html#opnsense-revert)

To Reproduce
Steps to reproduce the behavior:

1. Enable git backup with password and/or ssh key

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Relevant log files

User-Agent Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.36
FreeBSD 14.3-RELEASE-p14 stable/26.1-n272114-8616e879e31a SMP amd64
OPNsense 26.1.9 b11d6b340
Plugins os-acme-client-4.16_1 os-adguardhome-maxit-1.16 os-auto-recovery-community-1.0 os-cpu-microcode-intel-1.1 os-cronscripts-maxit-1.0 os-ddclient-1.31 os-dec-hw-1.1_3 os-dmidecode-1.2 os-dnscrypt-proxy-1.16_2 os-git-backup-1.1_3 os-homeassistant-maxit-1.0 os-hw-probe-1.0_1 os-iperf-1.0_2 os-nextcloud-backup-1.2 os-smart-2.4 os-speedtest-community-0.9_6 os-tailscale-1.4 os-theme-solarized-community-0.4_1 os-tor-1.10 os-upnp-1.9 os-wol-2.5_4
Time Fri, 05 Jun 2026 15:27:50 +0000
OpenSSL 3.0.20
Python 3.13.13
PHP 8.3.31

[04-Jun-2026 01:40:49 Etc/UTC] PHP Fatal error:  Uncaught Exception: unknown error, check log for details in /usr/local/opnsense/mvc/app/library/OPNsense/Backup/Git.php:198
Stack trace:
#0 /usr/local/opnsense/scripts/system/remote_backup.php(17): OPNsense\Backup\Git->backup()
#1 {main}
  thrown in /usr/local/opnsense/mvc/app/library/OPNsense/Backup/Git.php on line 198

Additional context
Add any other context about the problem here.

Environment
OPNsense 26.1.9 b11d6b340 (amd64).
Intel i5-8500T

Start with mvc/app/library/OPNsense/Backup/Git.php at line 198 and the remote_backup.php entry point at line 17. Reproduce the crash after enabling Git backup with a password or SSH key, then inspect the relevant log details. Done means the backup no longer terminates with the reported fatal exception in the stated OPNsense environment.