Update: So… it is still frozen in “Waking Up” phase. Sollution: I will wait till it drains out of battery, so I just tenporarily replaced Kindle Paperwhite 10 with my good old
Amazon.com: Kindle Paperwhite (16 GB) – Now with a 6.8" display and adjustable warm light + 3 Months Free Kindle Unlimited (with auto-renewal) : Electronics