Question

When using the OpenSEF component, saving entries in the frontend won't work and the user is redirected to the frontpage.

Answer

This is due to the fact that OpenSEF doesn't recognize the form in the component and just redirects to the frontpage instead. At the moment I don't know if the OpenSEF developers will fix this.

There are however two workarounds for this problem. The first is that you go to the OpenSEF configuration and turn off "Enforce Canonical URLs?" under the Features tab. The other solution is to turn off SEF for the Mamblog component in the OpenSEF settings, by checking the "Exclude" checkbox next to Mamblog on the Components tab in the OpenSEF settings.