Parallels Operations Automation (POA) 5.4 doesn't support versions of Parallels Web Presence Builder earlier than 11.0 (involves APS packages "Parallels Automation for Web Presence" and "Parallels Web Presence Builder").

Although already published sites will continue to work, publishing of new ones will not be possible.

After upgrading to POA 5.4, all instances of Parallels Web Presence Builder must be upgraded to 11.0 using the standard APS package upgrade procedure:
- Server part: APS package "Parallels Automation For Web Presence"
- Client part: APS package "Parallels Web Presence Builder"

Upgrade the server part first, and then the client parts.

The amount of time required for the upgrade depends on the number of installed client instances, but each instance should take <0.5 min.