This bug is well-known and has been reported. It has not been fixed in the game's final Update 1.10, so it is expected that the mission will never be officially fixed. The only known workaround is through third-party unofficial mods, with the proper course of action detailed below.
The mission was intended to work like this:
The herbs could then be collected from the people involved in the mission arc Emergency S.O.S. and then Task: Herbal Entrepreneurs. Ryder should have been able to interact with the plants to get a sample, but that is not possible.
Pathfinder Ryder is able to take a sample of an "Unknown Plant". Ryder is given a choice to eat some of the plant or not. Eating the plant causes Ryder to hallucinate for a little bit while SAM speaks to Ryder. Ryder snaps out of the hallucination and SAM lets Ryder know that this plant could be used to help the Nexus Refugees. The mission objective is then added to the Journal.
Take The Plant To Nexus Refugees Edit
Ryder takes the plant to the turian refugee and the mission completes.
- +270 XP