Error code 10 and can't create a new maps

Summary

The revision control don’t work, it’s says “The database connection could not be established. Error code 10. Extended error code 778”. Also I was trying to create other map and UEFN don’t let me make it.
This issue appeared after the last update.
(srry the screenshots are in spanish)

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

Open botton right revision control.
Try to activate.
Error 10.

Expected Result

Connect to revision control

Observed Result

.

Platform(s)

PC

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i can't save anything on my map - #2 by wouter contains some suggestions on your 778 error.