Thanks for the bug report.
The mod raffle functions have barely been tested since all the streamers find it much easier to use the GUI instead of asking mods to operate raffles.
Nevertheless, I have looked into it and the bug was that if the GUI was not selected on the Auction raffle type, it did not process bids.
Looked through the code and made a couple of bug fixes relating to command operated raffles in version 0.1.28. So this should allow you to run auction now.
Cheers,
Experts