Deleted9 июнь 2020, 11:0809.06.20221089Bug in Invader TreeYou may want to take a look into this:Hero's Endurance II a prerequisite to Endurance I
Deleted9 июнь 2020, 12:1209.06.20221089Greetings!Thank you for your message, but it's not a bug. You'll get the last Knowledge upgrade after upgrading the other Knowledge to apropriate level.