Anki needs to be open on this machine with the AnkiConnect add-on installed, and https://tangotype.com must be allowed in AnkiConnect's CORS list.
https://tangotype.com
In Anki, press Ctrl + Shift + A to open the add-ons window. Select AnkiConnect, click Config, then add https://tangotype.com to the webCorsOriginList array and restart Anki.
webCorsOriginList
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