My second ranger stronghold quest is not updating. I've checked a walk through, which stated that I have to go back out of the temple ruins and speak to the wood nymph again (the one that was standing outside before I went into the ruin). Unfortunately, she isn't there any more. Bug? Or game play? I've never done this stronghold before, so I have no idea.

Did you already get the messenger guy telling you to check it out? I haven't done the ranger one in ages but normally there's an NPC who will find you to start the quest... and it's usually several days after the first quest is finished.

If you go/ went to the Druid Grove then the messager gets stuck and can't give you the note... reload an different save game.