Hi and welcome to forum!
Only the author of WinUAE understands what minidump is about, I guess
But you can tell me what you did/installed before AmiKit started to behave like that. Also I need this information
from you, please.
To basic troubleshoot, press ESC to close the boot picture. Maybe some requester or important info is hiding behind it.
Also you might try to boot with no startup-sequence (press and hold both mouse buttons when rebooting) and type AmiKitReset (or Execute AmiKitReset). It will reset screenmode and restore default startup programs.