Beyonc won’t be saddling up to perform at the Sphere in Las Vegas after negotiations broke down — but she may ride into another Sin City venue, The Post has learned.

The superstar singer, whose latest album Cowboy Carter has gone platinum, had been in talks for months with the James Dolan-owned state-of-the-art venue, but the sticking point turned out to be Beyonc’s demand for the Sphere to go dark for two weeks so that she can rehearse, sources close to the situation said.

The $2.3 billion arena, which just celebrated the one-year anniversary of its outer exosphere, has four daily showings of the immersive film “Postcards from Earth” — with ticket prices starting at $104.

Shuttering the 20,000-seat Sphere for 14 days for rehearsal time would be a significant revenue hit, sources said.

Her team was also reportedly asking for about $10 million to produce the divas high-tech stage show roughly the same amount of money the Sphere paid U2 to put on its spectacle, as The Post previously reported.

Beyonc, who finished her “Renaissance” tour last September, is now speaking to rival MGM about a possible residency of roughly 100 shows over four years, the sources added.

There were no details on on how much Beyonc would get paid for the residency at MGM.

The Post reached out to Beyonc and MGM for comment.

A Sphere spokesman told The Post on Thursday: We do not comment on any artists performing at Sphere except for those who have been announced.

The breakdown in the Sphere talks comes after the Single Ladies singers manager-mom, Tina Knowles, as well as Beys husband, Jay-Z, took separate tours of the Sphere last year, as The Post exclusively reported.

Beyonc buzz peaked again in February when Verizon released a Super Bowl ad showing the singer sitting on a metallic horse on top of the LED-covered, orb-shaped venue.

The Sphere currently has Dead & Company booked for the summer before the Eagles begin a residency in September that runs through the end of the year.

Dolan  boss of Madison Square Garden, plus the New York Knicks and Rangers previously told The Post that he believes The Sphere is still developing its unique identity, with more changes to come.

The year anniversary really highlights that the idea works and that this is successful, he said.