webdev deployment and webdev development BOTH contains an execution engine, but it is set up completely differently.
Installing both on machine has always been a big NO-NO has it WILL create conflicts in some cases...
You are in one of these cases, so you need to
- uninstall webdev deployment
- uninstall/reinstall webdev development so that the webdev engine is setup correctly
it MAY be possible to simply uninstall webdev deployment and force a reinstall of webdev development, but it's not sure tat all that settings would be corrected in that case.