How to fix this Error?

Now there's no execution for one error and I'm asking a question for advice on this part. The code for the problem I'm currently experiencing is below,

UnityFramework* UnityFrameworkLoad()
{
  NSString* bundlePath = nil;
  bundlePath = [[NSBundle mainBundle] bundlePath];
  bundlePath = [bundlePath stringByAppendingString: @"/Frameworks/UnityFramework.framework"];
   
  NSBundle* bundle = [NSBundle bundleWithPath: bundlePath];
   
  //if ([bundle isLoaded] == false) [bundle load];  original code
  if ([bundle isLoaded] == false) [bundle isLoaded];
// modified code
  //UnityFramework* ufw = [bundle.principalClass getInstance]; original code
  UnityFramework* ufw = [bundle.class self];
   // modified code

  /*if (![ufw appController]). original code
  {
    // unity is not initialized
    [ufw setExecuteHeader: &_mh_execute_header];
  }*/
  return ufw;
}

int main(int argc, char* argv[])
{
  @autoreleasepool
  {
    id ufw = UnityFrameworkLoad();
    [ufw runUIApplicationMainWithArgc: argc argv: argv];

    return 0;
  }
}

If you build in this state, [ufw runUIApplicationMainWithArgc: argc argv: argv]; In this part, Thread 1: + [NSBundle runUIApplicationMainWithArgc: argv:]: unrecognized selector sent to class 0x1e8b42e10 is output.

CFRelease (NULL); If you add it above the line where the error is occurring, you will get an error with Thread 1: EXC_BREAKPOINT (code = 1, subcode = 0x197273e28).

If anyone knows either solution, please explain.