Have run a specific mission successfully multiple times in last couple days, including earlier today. Note that the mission does contain some AGL references, and those have been working just fine.
But I launched the mission this afternoon and got "Mission Failed", "Ground Elevations Not Available" almost immediately.
Restarted drone, controller, and mobile device. No difference. Edited plan (changed AGL references by 1ft just to change something). No difference -- same error.
What would cause ground elevations to be "not available" when launching the mission?
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