Just started playing and no matter where I place the Core I get this error message in the top left of the screen and I can't advance the game. Pressing "Ready" does nothing. It must be something really obvious but any help would be appreciated.

when i reach 30+ day the party just wipe my dungeon like nothing, i tried many combination of pathing or monsters or even traps but they can't stand the party, my ressources are enough but the monsters are weak even at b rank i really can't go further and i 'm still at the beggining of the game!...

There is a problem when you get to many monsters the tab doesn't show the arrow to close it. Its off screen and there is no way to get to it. Doesn't always occur but have to close out of the game to fix the issue. Anyone know how to get it to close without leaving the game every time? https://steamcommunity.com/sharedfiles/filedetails/?id=1980681072...

Would be pretty neat I think that after you beat the game you can start a new game with no dungeon restrictions to allow you to try out different monster combinations against different types of enemies and bosses.

I have no problems at all anymore with the waves, so I should be ready for the ending.. but I don't know what I'm doing wrong. I have tried to change a few of my monsters for other monsters, but the dungeon keeper always walks at the front, so he also gets killed very fast while still have tons of monsters left. How did others beat this part?...