Troubleshooting Tip: FortiClient Endpoint Management Server (EMS) v7.4.5 upgrade failure

Screenshot of the error:

There are three symptoms that can be observed.

1. The upgrade gets stuck at 50% in automatic and manual upgrades.
2. The FortiManager Log shows the upgrade status as having executed successfully.

id=831129658042316521 itime=2026-03-10 10:47:30 euid=3 epid=3 dsteuid=3 dstepid=3 type=event subtype=ems-upgradeworker msg=EMS auto upgrade from version 7.4.3.1926 to version 7.4.5 has been executed successfully. emsserial=FCTEMS0000000000 logid=31 date=2026-03-10 time=09:08:40 devid=FCTEMS0000000000 vd=test dtime=2026-03-10 09:08:40 itime_t=1773652541 regdevname=FortiClientEMS-test

3. The status email from FortiClient EMS shows failure.

Status email from FortiClient Endpoint Management Server (EMS):

FortiClient EMS upgrade scheduled to version 7.4.5 has finished with status 'FAILED'.
FortiClient EMS has been rescheduled to upgrade from version 7.4.3.1926 to 7.4.5 on 2026-March-10 08:59 (FortiClient EMS server time).

FortiClient EMS cannot complete a version upgrade, and the results are as follows:

$> system get info
EMS Version: 7.4.3.1926
FIPS Enabled: no
OS Version: Ubuntu 24.04.1 LTS
Linux Kernel: 6.8.0-55-generic
RAM: 11Gi (73.16% used)
CPU: 6 Cores

This problem mostly occurs when FortiClient EMS has no full access to the internet. Make sure it has full internet access during the upgrade period.