Why can't I submit portals any longer?

I've been playing Ingress for ~2 years. I have 70 portals approved. I play on a new-ish Android phone (oneplus one, cyanogenmod). I've always been able to submit a portal by turning on auto-sync, then, within the game, long-pressing on my scanner, then sliding right to select "create portal".
I'm on version 1.81.0 of the app. I was able to submit as recently as August 26. IIRC, I did get an update to Android 5.1.1 recently, though I'm not sure if that was the point at which I could no longer submit a new portal.
Any suggestions?
Best Answer
Niantic (if you follow the link in Maerlyn's answer) says they are reworking the portal submission and edit approval system.
We can expect some kind of voting system allowing players taking part in the approval, but it's not easy to implement without allowing factions to consider it as a sub-game where you create portals useful for you and remove the one used by opponents.
They are much less overwhelmed by portal submissions since they have disabled the seer medal. Submission of good quality portals in place where portal density is low were often approved in a few days.
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How do I submit in Portal?
Using Simple Submission to Submit or Upload Documents to the Portal Knowledge DirectoryWhat level in ingress to submit Portals?
Agents who've reached level 10 can help grow the number of Portals in their community by nominating eligible objects and locations. Once submitted, the nomination will be evaluated by Niantic's player community, and highly-rated nominations may be accepted as Portals.How do I report an invalid portal in ingress?
To Report an Invalid Portal Using the Scanner:How do you move portals in ingress?
2 AnswersLiz Phair - Why Can't I? (Official Video)
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