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Firmware 2020.48.x

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Lol relax, what you see isn’t the full release. Tesla has different release notes for different parts of the world. This is most likely a controlled leak, containing a preview of what’s to come for North America. Also don’t get your hopes up about actual FSD Beta features coming to the car. That stuff was not promised to be in this update and it’s simply just not ready to be released to the masses anyway

Actually, FSD Beta was promised by end of the year. But then again, Elon isn't always accurate.
 
Similar thing happened to me but without the error message. Update went well but Wifi was acting weird for 2 days so did a soft reset (2 button) which threw the car into a loop of what felt like 4 consecutive resets which deleted all user customizations, wifi and driver profiles, trip counters, only the keys and ODO remains.

Installed 2020.48.12.1 on a Model 3 EU LR 2021.

Error message after the update, call assistance.

Reset 2-wheels&pedal erased any setting, data entries, key associations, trip values & energy screen (just odo remained), location Fremont at mothership.
Now BT & Wifi malfunctions, navigation impossible.

Watch out, i've already read (can't find it now) of identical behaviour on this update when reset.
 
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Release notes for Model 3. 85857297-7C1E-45F8-BDF0-1AFE3B506EDA.jpegEDEF47BA-C78E-4902-9EC8-3D103979F20E.jpeg