Hi there, are you coming from an older version of ROP? You might have some frozen settings that need to be cleared if you just recently updated or reinstalled the plugin on your website.
Please try the following:
Step 1.
Go to General Settings on the ROP Dashboard and scroll until you see Housekeeping at the bottom. Check this option to say Yes and then Save your changes.
NOTE: This will delete ALL plugin settings so you will have to set it up again
Step 2.
Go to your WordPress Dashboard > Plugins.
Deactivate and delete the Revive Old Posts plugin.
Step 3.
Reinstall and activate the Revive Old Posts plugin.
Step 4.
Go to the ROP Dashboard and reconnect your social media account.
Set it up and do another test.
Let us know how it goes.