This is one of those weird designs with build-in doors. On a calibrated printer it should print the floor and the door as one piece (tavern-floor_01lh.stl). To make the doors open, push them slightly back and forth. Do not force, or you will break the prongs.
If your doors failed to print, there are floor and doors as separate files. You will have to make little holes in the doorway in order to fit the doors in place. I will update this design one day, but for now it's as is.
If you are at all worried that your printer won't manage to print my files supportless, or you want the best possible quality — feel free to throw in some supports. I print on Ender 3 Pro with modified profiles from Fat Dragon Games with no supports whatsoever. I use a brim just in case, though.