The free to play MMO (Massive Multiplayer Online) Lord of the Rings Online was supposed to be rolling out its latest expansion Mordor on July 31. Due to some technical issues found just before launching, Standing Stone Games has announced that the expansion will be delayed for an unspecified amount of time until they can fix the problems.

The team and Standing Stone found an issue with the latest build of Mordor that left monsters and NPCs moving incorrectly. The teams full statement is as follows:

We are as excited as many of you to get into Mordor, but we have some unfortunate news: we have to adjust the release date. While preparing over the weekend to release the expansion on Monday, we discovered an issue in the build that impacted the ability of monsters and NPCs to move around correctly. This problem was specifically identified in older content.

While correcting this issue is not a problem, the process to correct it takes too long to be able to release Mordor on Monday. So, we have to adjust the release date. We will have more info on the release date soon. We will know a lot more in the next 24 hours or so, and will pass along the info as soon as we can.

Lord of the Rings Online is free to play and has been live for just over ten years. The new Mordor expansion is a paid extension of the game that retails at $40. There are also Collector’s Edition and an Ultimate Fan Bundle, which can be found here. The expansion includes over 300 new quests, “hundreds” of new Deeds, and a new playable race: High-Elf. Mordor takes adventurers on a journey beyond the Black Gate and into the terrifying region of, you guessed it, Mordor. This marks the sixth expansion for Lord of the Rings Online, with the five previous expansions being titled Siege of Mirkwood, Mines of Moria, Rise of Isengard, Riders of Rohan, and Helm’s Deep.

DFTG will update as news unfolds about a new release date. Are you a fan of Lord of the Rings Online? Are you disappointed that Mordor is facing a delay? It’s rare that companies take the time to get it right the first time, versus waiting to patch at a later date, what are your thoughts? Sound off in the comments section below. Be sure to follow DFTG on Twitter for our 24/7 live feed of the hottest news in gaming and entertainment.