Hi,
to me it sounds like "a murder", and that the update did not end well.
Hopefully some of the experienced KN7k users around will come to rescue
and guide you about how to get it work again.

Good luck, I know how frustrating it is when such things happen.

Cheers,
GJ
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Cheers 🥂
GJ
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"Success is not counted by how high you have climbed
but by how many you brought with you." (Wil Rose)