K2 not seen in Creality Print

I’ve been easily printing with my K2 for two days. Today, I upgraded Creality Slicer to the V6.0.2.1574 update. The first 3 prints started and failed (my fault). When I tried the fourth, Slicer could no longer see the printer on the network. It was connected by WiFi. The device was still seen as connected when I went to the device tab, but when I went back to try to print, the pop-up window had no printer selected in the drop down menu, and there were no printers seen in the menu itself. I saw another post here that fixed it by changing WiFi bands. Instead, I plugged it into my ethernet. I disconnected WiFi. The printer was then assigned a local IP address. Creality Print still can’t see it. I downgraded Creality Print to version V6.0.1.1375, which used to work flawlessly. It could not see the printer.

How should I fix this? My next step is going to be factory resetting the printer.

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@dapht , I had less problems with *.1.1375 so far than with previous versions. Where I had a similar experience, but in all cases it helped to switch (power of) printer off and on again after a view seconds. I realized that sometimes the printer internally and not accepting any requests from CP6, especially if I have stopped failed prints manually.

P.s.: I am using printer only on Lan and no Wifi. If you can access printer fluidd on http://printer-ip:4408/ you can try also to reboot in there without switching of/on, but in 10% of cases only a switch off will help.