Just wanted to go on record stating that I've seen this happen personally: In January 2020, the PA medical marijuana computer system was "down." Even though you have a valid card, they won't let you into the dispensary. There were half a dozen patients in the waiting room, unable to enter. The following day, it was working again.
(Original article)
Medical marijuana patients across the state couldn’t buy medicines Tuesday due to an update in a tracking software system that’s supposed to track sales, not prevent them.
The Pennsylvania Department of Health requires all marijuana transactions to be processed through a software system called MJ Freeway. The seed-to-sale tracking software has been prone to chronic glitches since the state signed an exclusive $11 million contract with the Colorado-based company.