Submersible - "Unable to retrieve extracted items. Insufficient inventory space."

I have the necessary inventory space and FC permissions to retrieve submersible items, but I get the error message "Unable to retrieve extracted items. Insufficient inventory space." when I try to do so by using Redeploy or Finalise Report. Therefore the airship is currently unusable since it cannot be sent out for more missions.

Please see images:

https://i.imgur.com/SfEbi2h.png
https://i.imgur.com/9Aw4Vap.png

Date & Time: February 18 2018, 8:35am ST
Frequency: Always
World name: Sargatanas
Character name: Momoko Tomoko
Class/Level: Any job/level
Party or solo: solo
Area and coordinates: Company Workshop
Housing: FC House
Steps:
1. Tried to retrieve item from submersible. Have sufficient FC privilges and inventory space, but I get error message "Unable to retrieve extracted items. Insufficient inventory space."
2. Have tried restarting game and entering/leaving workshop and still get same error.

You have crystal stack full, most likely. :)

Ah you are correct! I thought those were deep red crystals for some reason and I haven't checked my crystals inventory in a while since I don't craft much. Looks like issue solved (however hopefully they can upgrade the error message so it actually mentions the crystals).