Originally Posted by
cultofthefish
Right, so regarding this error:
Relogging does correct this but the bigger issue seems to be that the game doesn't immediately realize when you've advanced a level.
Try running the Tangleroot Chain on elite at level 4; you'll encounter the same issue once you're on the last 2 quests (these are base level 7, lvl 9 on elite, and too high a spread for a character at level 4 to enter - it wont even appear on your quest log yet, likely the primary reason Tangleroot isn't available on Reaper mode) - it just won't let you enter. Even if you take level 5, you will continue to encounter the '...must meet the quest requirements' snag until you relog. I'd argue it's related to favor delays (for example, you'll often see the mail message that you've earned points, but the total favor 'bar' hasn't updated yet and shows you as being just shy of that 100x reward - until you enter a new quest or relog), or ffor another example, examining the LFM right after taking the next level - you'll see quests greyed out that you should be eligible for, and you'll still be (apparently) eligible for groups that you no longer meet the maximum level for.
In short, I'd say it's a longstanding issue with a database update upon taking a new level that is usually resolved by completing a stand alone quest (not a chain) or forcibly updated with a quick relog.
This has been my experience at least.