I am also having this error. Xcode 13 iOS 15 simulator fails at loadRequest:
NSURLRequest* request = [[NSURLRequest alloc] initWithURL:url];
[_webView loadRequest:request];
Error shown is:
Thread 1: EXC_BAD_ACCESS (code=1, address=0x10)
Another thread suggested turning off the experimental feature in Safari for GPU rendering and this fixed the crash.