Is it ok for me to go one night without my invisalign?

Yes: One night will not cause a critical problem.

Probably yes but,: Missing one night may not be a problem, BUT missing several nights/days/weekends may effect the final result. 100% compliance is the best choice!

Sort of: One night won't be a problem. However one night this week, two nights two weeks later, leave it out for 2 hours next week, then an afternoon the following Thursday, or forget to wear it at work, and pretty soon your Orthodontist is going to start pulling his/her hair out. The more you wear the trays, the sooner and better the finish. Don't get into the habit of cheating yourself.