Fyre Festival 2 ain’t happening in late May, early June like it was originally scheduled … ’cause it’s been postponed, without new dates selected yet — and organizers are laying full blame on Mexico.

The website only says tickets are “currently not available” when customers to make a purchase, but the event’s infamous promoter Billy McFarland is now admitting it just ain’t happening … confirming the story TMZ broke 10 days ago.

FYRE Festival 2 organizers say … “Over the past 18 months we’ve worked closely with experienced third-party festival operators to ensure FYRE Festival 2 is built to the highest standard” … but he claims the government in Playa del Carmen screwed ’em.

While the show for sure isn’t happening from May 30 to June 2, new dates for the festival have not been selected yet.

As we told you … Fyre Festival 2.0 looked on track to redeem Billy McFarland after the disaster of the first festival led to his incarceration due to wire fraud — for which he served more than three years in prison.

BF came on “TMZ Live” back in February and assured us the show was all set … though he refused to name a single act he claimed had been booked, offering only a vague hint about one DJ.

As organizers insisted the festival was set to happen in Mexico, a source confirmed to us that organizers say the Mexican government backstabbed them and left them without a place to put on the show. In March, Billy posted a video said any claims to the contrary were bogus.

Our source told us, “…at this point we’re not doing any event there and we plan on making it very public and showing all of the evidence.”

While authorities in Mexico initially seemed to be onboard with the festival happening in the country, they’ve recently claimed they had no knowledge of Fyre Festival 2 happening … while pictures shared to the festival’s account seem to show documents filed with the city of Playa del Carmen.

It’s all pretty murky right now … but, bottom line, FF2 is currently on hold.