Portal Limbo: What it is and isn't
Portal Limbo is when your nomination has enough agreements to go live but doesn't because it is in a portal exclusion zone. Portal Exclusion Zones are created when a property owner requests portal removal. This is usually around Churches, cemeteries, and schools. Portal Exclusion Zones used to be much larger and affected a wider area around themselves than they do now so there were more portals in Limbo. Portal Exclusion Zones are tiny now if they even exist at all anymore. If you think you have a nomination in Limbo you can contact support and they can look to see if your nomination has enough agreements to go live and if it falls into a part of a limbo zone where it is safe to be brought online manually without trespassing on a property where portals have had removal requests.
Limbo is not when your nomination hasn't reached an agreement. Your nomination is still in the queue and is just waiting for enough agents to agree one way or another if it is a good or bad candidate. If it is a questionable candidate it can take significantly longer, especially in low active areas. You will eventually get a judgement, you just need more agents in that area to render one. It feels like limbo but it's not. If you ask support to look in to your nominations they will tell you they are still awaiting a final decision. It sucks and there needs to be some kind of a fix because not even upgrades help these. Giving OPR agents a third area far outside their own and building Google translate into the opr browser might be a start.