You can ignore this. My server wasn't hitting the internet. It was pointing to the address of my old router. Fixed that and everything seems to be working OK.
Something really wrong went on during get_categories
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No data was returned. It is probable that another browser session has rebooted your server. Reloading this browser tab will probably fix this error
should note that I have indeed reloaded the tab many times and also searched for other instances of browser tabs pointing to the page. This started happening after I moved my server to a new rig.