If it's not horseshit, the wording is incredibly bad. His contract expires on 30th June. It wouldn't be mutual consent, simply that they have been unable to agree on a new contract. If Rafa does not want to extend/renew on the terms and conditions offered, early notice of that allows the club to speak openly to alternative candidates.
It shows a photo of Sky Sports timed at 12.14. It is now 17.52 and does not appear on the Sky Sports website. If you have a closer look, the Tweet is from @skyspErts