Apple has temporarily pulled the latest Rapid Security Response update due to a bug preventing some websites from working correctly in Safari.
Apple pulls the latest Rapid Security Response because it broke websites
Rapid Security Responses
Apple’s latest Rapid Security Response update protects you against an actively exploited vulnerability [pulled]
Apple has released a new Rapid Security Response update for the iPhone, iPad and Mac to fix an actively exploited vulnerability discovered in its WebKit engine.
Apple’s first Rapid Security Response launch didn’t go smoothly
For some people, Apple's first public Rapid Security Response has failed to install even though an over-the-air update has downloaded successfully.