If you have an older Daedalus installation (4.x or 5.0.x), uninstall it completely. Version 5.2.0 uses a different asset pipeline; leftover files can cause conflicts.
If needed, install Google Apps in the same way. rice daedalus 520 zip install
A well-formed rice zip for Daedalus 520 will have a folder structure like this: If you have an older Daedalus installation (4