Plugin errors

Hello. I’ll explain the issue but as I see the developers never respond, I have doubts about this plugin.

After installation if you look at the dashboard panel, if you look under “Settings,” you can see “Shortio links” but if you click it all you see is an empty page and at the top it says “Missing Credential.”

If you look at the plugin list and then click “Settings” it takes you to the “Writing” tab, where you find shortio settings under the usual writing settings and labelled “WP Shortcm Options.”

Doesn’t make sense. I’m disappointed and doubtful about even trying to set this up.