课程信息
调试信息：
Error code: generalexceptionmessage
Error code: generalexceptionmessage
堆栈跟踪：
- line 2233 of /lib/filestorage/file_storage.php: Error thrown
- line 405 of /lib/filestorage/file_system.php: call to file_storage::mimetype_from_file()
- line 370 of /lib/filestorage/file_system.php: call to file_system->get_imageinfo_from_path()
- line 583 of /lib/filestorage/stored_file.php: call to file_system->get_imageinfo()
- line 598 of /lib/filestorage/stored_file.php: call to stored_file->get_imageinfo()
- line 584 of /theme/enlightlite/renderers/course_renderer.php: call to stored_file->is_valid_image()
- line 89 of /course/renderer.php: call to theme_enlightlite_core_course_renderer->coursecat_coursebox()
- line 72 of /course/info.php: call to core_course_renderer->course_info_box()