Electric Picnic Organisers are calling for a reversal of the decision not to allow the event to go ahead.
It comes following comments from the Chief Medical Officer.
Dr Tony Holohan said earlier that NPHET wouldn't have any major public health concerns about an outdoor event for vaccinated people only, such as Electric Picnic.
EP organisers had been hoping to hold the gig in Stradbally at the end of September, with only vaccinated people to be allowed to attend.
Despite this, Laois County Council refused the festival a licence on public health grounds.
In a statement, Melvin Benn of Festival Republic is calling for that decision to be reversed.
He said it should be granted "immediately in line with the CMO’s conditions: that everyone attending should be vaccinated, exactly as we said a month ago".
Mr Benn close the statement by saying "What a springboard to the future this could be. Change the decision Laois County Council and let’s have the Picnic. Tell us tomorrow and we are on our way."