Zwift closes after Ride On

Hi, I’m using a Mac running El Capitan. During several months of regular use, I’ve twice had periods where Zwift closes every time I click Ride On at the launch screen. The first time this resolved itself. Now it’s been doing this for several days. I’ve removed Zwift, re-installed, rebooted, but no joy. Zwift works fine on my iPhone app.
Grateful for any advice.

Probably this: Crashes on macOSX 10.11 El Capitan? [1.14.0] [June 2021]


Thanks for the direction, @Dave_ZPCMR, that sounds like exactly my issue.