Technical Tip: SSL VPN web mode does not work after upgrading to v7.4.8 on low end models

After upgrading the firmware to v7.4.8, the SSL VPN web mode began displaying the message 'Error. Access denied.'.

When running the following debugs, the 'sslvpn check path failed' error is seen:

diagnose debug application sslvpn -1
diagnose debug console timestamp enable
diagnose debug enable

2025-06-04 13:17:20 [252:root:2c6]fsv_check_path_passed:997 No access: check path failed /migadmin/assets/brand-login-right.svg, /data/migadmin/assets, /migadmin/assets
2025-06-04 13:17:20 [252:root:2c6]sslvpn_zip_handler:136 sslvpn check path failed.

This issue affects only the 2GB models and has been resolved in v7.4.9.

In the meantime, the recommended workaround is to downgrade the firmware.

From FortiOS v7.4.8 onward, SSL VPN web and tunnel mode are no longer available on FortiGate G-Series Entry-Level models (such as 50G, 70G, 90G, and their variants).
SSL VPN not supported on FortiGate G-series Entry-Level models