The electronic lock on the back door jammed shut while I was outside getting food, and my friend was inside, within an hour of check in. It could not be opened manually from the inside, remotely, or using the keypad on the outside. There were many warnings asking renters to not use the front door of the rental, but this was our only way in and out. The rental company seemed to use an after hours call service or staff member with limited knowledge of the property who sent me back and forth between the front stairs and back stairs in the rain over the course of 45 minutes searching for a lockbox. When we finally located the lockbox, in a different place than I was originally told, the key was to the back door only, which was jammed shut by the electric lock, so there was no way to get in or out unless my friend stayed inside, holding the front building door open for me to get back in, meaning we would be fully locked out if we both left the property.We were in town for a conference and missed an entire evening of one-night-only exhibitions that we had come to town to see. It took several calls and messages to get confirmation that we would be refunded in full, and we ended up having to rent a hotel last minute for the duration of our stay.In the lead-up to our stay, the host was communicative and the place itself was nice, but a faulty electronic lock that jams shut, trapping renters inside or out, with zero back up plan to get in and out through the front door is a hazard.