Umbraco 13 - 17 Upgrade No Physical Template was found

[jacob (Jacob Overgaard 🚀)]

You could try and install the Umbraco.Cms.DevelopmentMode.Backoffice package, which ordinarily should not be necessary, but I’m not sure in which state your Razor compilation is in at the moment.

Someone had luck fixing the problem that way:

Page Not Found after upgrading from 16.1.1 to 17.1.0

I read some other threads here at the Forum where several people gave me the advice to install Umbraco.Cms.DevelopmentMode.Backofficeand so I did. It now works and I can reach all the pages, but will this also work in production when I deploy the upgrade of Umbraco 17? Or is this package just solving my issue when I’m working locally in development environment?