React-native: चौकीदार - नो-सुंदर गेट-सॉकनाम एग्जिट कोड के साथ वापस आ गया नल

मैं मूल पृष्ठ प्रतिक्रिया से स्टार्टर गाइड का पालन करता हूं। कमांड चलाने पर react-native run-ios मुझे निम्न त्रुटि मिली:

watchman--no-pretty get-sockname returned with exit code null dyld: Library not loaded: /usr/local/opt/pcre/lib/libpcre.1.dylib
  Referenced from: /usr/local/Cellar/watchman/4.5.0/libexec/bin/watchman
  Reason: image not found

 ERROR  watchman--no-pretty get-sockname returned with exit code null dyld: Library not loaded: /usr/local/opt/pcre/lib/libpcre.1.dylib
  Referenced from: /usr/local/Cellar/watchman/4.5.0/libexec/bin/watchman
  Reason: image not found

Error: watchman--no-pretty get-sockname returned with exit code null dyld: Library not loaded: /usr/local/opt/pcre/lib/libpcre.1.dylib
  Referenced from: /usr/local/Cellar/watchman/4.5.0/libexec/bin/watchman
  Reason: image not found

मेरा सिस्टम: मैकोज़ 10.11.6, नोड 6.2.2