The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
https://prnt.sc/xk9gg3
numbers in the last row is the amount of ras sacus needed. need to round up to the next number ( if you need 7.75 sacus for CZAR still means that you need 8 or can use 7 but will need to build it for some time to finish it)
