Can no longer print from Cura

Hi Guys, I have been sending to my Creality CR10S from Cura for a long time without issue.
The other night I closed down and went to bed, next day in Cura the "Send to Octoprint" option is not showing, only "Save file"
I just updated to Cura 4.8 and Octoprint is up to date.
I have tried deleting the plugin and reinstalling but after providing an application key Cura says Octoprint is not available.
Any ideas?

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