That issue was resolved on October 15th in
LibResInfo r27. If you are using an addon which embeds LibResInfo, make sure you have a version of that addon released
after October 15th, or you probably still have an old version of the library.
Also, while I appreciate that you wanted to be helpful, just saying "I got an error" without any other information -- like what version of what addon(s) you are using, what region and language you are playing WoW in, etc. -- does not actually give me anything I can use to track down the bug and fix it (or tell you why it's not a bug).