Instead of defending his belt, Didier spent his Saturday calling sponsors to make new arrangements, headlining a group of fighters that have suffered financially as a result of the cancellation.

Kelly wasn't going to be in Didier's corner having left the country to prepare for his next bout at UFC Liverpool later this month, but took to Instagram to voice his frustration in support of Didier, writing "the blame lays squarely on Brace and you should be paid".

Pate is waiting for more details before commenting however the promotion sent a statement to ticket holders on Sunday morning.

"After setting up the event arena on Friday and as we were in the process of conducting the weigh in we were notified via phone that the ACT Combat board (ACT government) was not permitting the event to proceed," a Brace statement read.

"Brace had already applied for permits well in advance and had the sanctioning body approval. We will be receiving a full report on Monday 7th of May from the ACT government as to the reasons.

Didier was supposed to headline the show in March before his title defence was shifted to May, however the 29-year-old has been left without a fight both times and his immediate future is unclear.

The Brace organisation has been left staggered by the decision to cancel the entire event and will now begin to "refund all tickets in full".

"After 10 years of events across nine cities, four states and two countries we have never had an event cancelled from a governing body," the statement read.

"It is not the norm, in fact we have never heard of this happening for the little limited reasons given, we have however had at almost every fight event had fights removed from the card due to incomplete fighter registrations (this happens at nearly every show we have staged) and is something we are used to.

"We can say we were very ready to proceed with this event on Saturday, the Arena was ready, the AIS and Brace were set for action."