Hi, I'm currently receiving errors whenever I use the 'Required Course' and 'Lesson required for the course validation'. Whenever I try to use these forms, I get this error: "An AJAX HTTP error occurred. HTTP Result Code: 500 Debugging information follows. Path: https://lms/entityreference/autocomplete/single/course_required_quiz_re… StatusText: Service unavailable (with message) ResponseText: Page execution time was 434.72 ms. Memory used at: devel_boot()=3.3 MB, devel_shutdown()=30.88 MB, PHP peak=31.5 MB." The current installation that I have already has courses and lessons created. Is there anything that I need to configure to make this work? Thanks.