Sorry for the late answers, but my wife gave birth yesterday so I have been quite preoccupied. I have a tiny bit of time now, so I’ll answer briefly, but it might potentially take a few days until I can reply properly.
Seems like same issue, different number? Critchance should be 1.00, not 100.00
Hard to know what you are doing wrong, but that means that the issue happens during grid generation. You can try to debug the grid generation functions yourself, wait for me to come back in a few days, or perhaps try to ask for help on the ATBTT discord.
The UpdateTilesInRange function can be used for this. I answered a similar question a few pages back in this thread if you need details.
Not sure about the second one, but the first erros happen because the abilities in the JungleRaid example for the most part assumes that your actors have some components. Namely that your unit have the ExtraAttributes and StealthUnit component and your GridManager has the stealth and cover components.