I did not find any other discussion where to post a bug report, so I try here hoping this is the right place.
In italian version of the game, after 1.3 upgrade, in mission proposals by AI players instead of usual goal appears "String not found": it is a minor bug because it is possible to understand the mission goal looking at icon inside the mission details, understanding if the request is to destroy ships or installations, but I do not know if are present new mission goals never appeared.
Hope this help.