I have been running into the same issue.
It's common in games where we try to use a landmark, but are using set randomizers with non-landmark sets.
For example, the setup shown in the attachment has this issue about 50% of the time. Selecting "ready" again often fixes the issue. Switching the set to cornucopia has the same issue.
However, switching the set to Empires fixes this issue (5/5 attempts worked).
It's common in games where we try to use a landmark, but are using set randomizers with non-landmark sets.
For example, the setup shown in the attachment has this issue about 50% of the time. Selecting "ready" again often fixes the issue. Switching the set to cornucopia has the same issue.
However, switching the set to Empires fixes this issue (5/5 attempts worked).