Horde is unavailable while the system is being upgraded

HTTP error 503
The service is unavailable.

Horde is unavailable while the system is being upgraded.

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So sometimes Horde won’t work after a cpanel update. I found this post here:

https://forums.cpanel.net/threads/horde-wont-load-after-update-to-11-52.503071/

so through ssh run:

cd /var/cpanel/.application-locks
rm HordeUpdate\:username