Here is the article from The Times. Whether it is true is moot. What is true that many wish it were.
“President Putin is “very ill with blood cancer”, an oligarch close to the Kremlin is reported to have said.
The unnamed oligarch was recorded discussing Putin’s health with a Western venture capitalist in mid-March in a recording obtained by New Lines, a US magazine.
The Russian says in the recording that Putin had surgery on his back linked to his blood cancer shortly before ordering the invasion of Ukraine. He complains that the president has gone “crazy”.
He says that there is deep dissatisfaction in Moscow about the state of the economy and, appearing to speak on behalf of other oligarchs, says “we all hope” that Putin dies.
“He absolutely ruined Russia’s economy, Ukraine’s economy and many other economies — ruined [them] absolutely,” the oligarch says. “The problem is with his head. One crazy guy can turn the world upside down.”

His face looks very swollen.