I’m guessing that you mean links in the metabox tabs? And the metaboxes are blank, aside from the tabs? That would indicate a javascript error caused by your theme or another plugin. A javascript error will cause the web browser to stop executing all javascript after that error, which would prevent WPSSO’s own javascript from executing and displaying the metabox content.
See here for info on how to view the javascript console and get the error message:
https://wpsso.com/docs/plugins/wpsso/installation/troubleshooting-guide/#javascript-and-jquery-errors
You should report the error to the related plugin or theme author.
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