I know this is a necro, but since you never got a reply and might be frustrated...
You grew your population too large. The map begins with very little food and insufficient agridomes. It is still salvageable as long as you only have ~300 people. If you have more than this, you'll need to revert to a previous save.
What you need to do is immediately reduce game speed to 1. Then, build nothing but agridomes, built as close as possible to the structure factory. Queue up your convecs and with proper management you can juuuuust barely scrape by.
