When trying to do anything at all, this occurs; it covers the entire screen and prevents me from doing anything.
Christian Knaapenrepo owner
Temporary workaround: set useShaders to false in the config. You can do this ingame by clicking ESC > Mod Options > Effortless Building Config > visuals > useShaders = false. I will continue to investigate.
I cannot reproduce this exactly without more information, but I did fix a shader issue, so this is probably fixed as well. Try version 2.11, if it still occurs re-open this issue. Otherwise its considered fixed.