If the release notes mention it, you will need to perform migrations before using the application.
Considering that https://www.acme.com:9443/secollab
is the URL of the SECollab application, you need to go to the URL https://www.acme.com:9443/secollab/setup
.
The migration page will display the list of migrations that must be performed.
If the migrations contain breaking changes, a confirmation checkbox will be displayed.
Click on Migrate to start the migration.