The virtual-reality business won’t grow as quickly as expected this year — and it has no one to blame but itself, according to a research report out Wednesday.

Manufacturers of the VR hardware aren’t cranking out headsets quickly enough, the report found.

Facebook’s Oculus Rift headset and the competing HTC Vive are among the VR headsets that have admitted in recent weeks to supply-chain hiccups.

Accordingly, research firm SuperData has slashed its 2016 sales forecast for VR hardware and software to $2.9 billion — a 22 percent drop from an outlook last month.

It was the second time the outlook for VR has been slashed by SuperData, which in January had initially forecast $5.1 billion in VR revenue for 2016.

“There is a significant gap in the ability to fulfill consumer demand due to parts shortages and unforeseen popularity,” SuperData noted.

More than 13 million Americans said they intend to buy VR headsets this year, but only 7.2 million are estimated to ship, SuperData reported.

Last week, the maker of the Oculus Rift pushed back shipping dates of the high-end headset because of an “unexpected component shortage.”

Rift orders made this week aren’t expected to be delivered until July or August — despite the fact that its headset is priced at a steep $599, not including a tricked-out PC that typically costs at least $1,000.

HTC’s Vive headset, priced at $799, has meanwhile been delayed by “payment processing” issues. New Vive orders aren’t expected to be delivered until June.

Still, Superdata backed its earlier forecast for longer-term growth, saying VR sales will reach $22.86 billion by 2019.