Weird message that appears when a group of 4 or more people try to register. Individuals, 2, and 3 are ok. I tried looking through the debug records, but only found one thing in there that piqued my interest.
transactionId: 68,
amount: 1,196.00,
description: 2019 Fall Conference Training,
merchant_transaction_id: 67
The merchant transaction id and the transaction id are different here. I did not check to see if this was normal or not. I am on the latest version, and ran the install again last night to see if a file missed being installed. Still the same error.
On an unrelated note the Admin side is missing several items in the component menu, including DT Register after I updated. I found the fix for it, but was not where I could repair it at that time. It will be another 6 hours (from now) before I am where I can fix that issue.