Earlier today, he noted on Twitter that he is out of action due to a torn meniscus. Presumably, he suffered the injury on Tuesday night during SmackDown Live because that is the last time he wrestled.
Making mincemeat of my meniscus
Crossbody cooked the cartilage
Bye for a bit
— Florida Man (@WWEBigE) April 11, 2019
That type of injury usually means 6-8 weeks of recovery time before being cleared to return to action.