[Steven Zahm]

@ Ben

My first guess is that you’re using an older version of Link. Can you first try updating Link to the latest version?

If that doesn’t fix it and since “it started recently” that hints to the possibility of a new plugin that was installed or a plugin update that is breaking the hook in WordPress Link hooks into to properly function. Which plugins have you installed or updated recently, try deactivating them to see if the error goes away.