Hi, I have completed all prerequisites to be bale to do this quest. I have done every part except where I need to enter the grotto to summon the spinysaur. When I attempt to walk through the waterfall entryway it does not allow me to go through. I have tried several times for the last day and a half, I have switched realms, and given it plenty of time to load but it will not let me through to complete my quest. I did send a bug report but I was wondering if this happened to anyone else? Is there anything I can do in the meantime? Thanks!
It sounds like you haven't completed the storyline quests to access Tierra de Brea yet. Finish off your quests in Cloudburst Forest and keep following the storyline and you'll get there.
