The yellow diamond means that ‘No New Posts Were Imported’.
This means that all posts were already imported (new posts will be imported when the source get’s updated with new entries).
In some plugins, you can check a rule settings (found in rule’s ‘Advanced settings’), named ‘Remember Last Posted Item And Continue Search From It’. Please check this checkbox (if the plugin you are using has it), and try running importing again.
If still no posts imported, please check query words (or other plugin settings), that could limit the number of posts returned.
Here you can check also settings like: ‘Maximum Title Word Count’, ‘Maximum Content Word Count’, ‘Minimum Title Word Count’, ‘Minimum Content Word Count’, ‘Banned Words List’ or ‘Required Words List’, which any could cause posts not being imported (skipped).
Also, you can check the plugin’s ‘Activity and Logging’ section, where you would see hints about posts being skipped because of one of the above settings.