1. Use Save Configurations
Some map seeds may produce mountain or lake where a civ historically spawn. So it may throw an error. (See Lua.log in ~\My Games\Sid Meier's Civilization VI\Logs). Reload the same config via Advanced Setup -> Load Config Auto saves, and select your leaders excluding the one that caused the error.

(Since the Apr 2021 Update, Save Configurations no longer save map seeds. So from the same Lua.log file, find the map seed and copy paste it into your game's Advanced Settings.)

2. Choosing both Sulaiman (Ottoman) and Basil (Byzantium) will cause an error as they share the same TSL.