Hey do you really think anyone has your problem?
Answer, no almost no one has your problem and almost always if people have a problem with their vendor information they did something wrong before.
A vendor is the legal entity which is selling somehing, that is a vendor. Usually this error happens because people delete their administrator from the user config and wonder then that vm has no vendor anylonger.
Or in other words, when you drive with your car against a tree,.... the car cannot prevent that.