So I just got out my Form 2 after a year or so of being ins storage. I opened up a brand new v4 grey resin. Though when inserted it says cartridge ‘none’. Taken it out and re-inserted and still no joy. I also tried my black resin and almost empty grey v3 resin cartridges and it didn’t detect those either so could this be an issue with the contacts for the cartridge? Any help would be great.