JSON::ParserError - 767: unexpec

当pod install时，出现如下报错
Error

JSON::ParserError - 767: unexpected token at '{
  "name": "SJUIKit",
  "version": "0.0.0.28",
  "summary": "SJUIKit.",
  "description": "`Objective-C` UIKit",
  "homepage": "https://gitee.com/changsanjiang/SJUIKit",
  "license": {
    "type": "MIT",
    "file": "LICENSE"
  '
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/json/common.rb:156:in `parse'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/json/common.rb:156:in `parse'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/specification/json.rb:61:in `from_json'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/specification.rb:748:in `from_string'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/specification.rb:722:in `from_file'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/source.rb:188:in `specification'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver/lazy_specification.rb:37:in `specification'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver/lazy_specification.rb:29:in `subspec_by_name'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:362:in `block in specifications_for_dependency'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:362:in `map'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:362:in `specifications_for_dependency'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:165:in `search_for'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:274:in `block in sort_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:267:in `each'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:267:in `sort_by'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:267:in `sort_by!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:267:in `sort_dependencies'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/delegates/specification_provider.rb:60:in `block in sort_dependencies'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/delegates/specification_provider.rb:77:in `with_no_such_dependency_error_handling'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/delegates/specification_provider.rb:59:in `sort_dependencies'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/resolution.rb:754:in `push_state_for_requirements'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/resolution.rb:744:in `require_nested_dependencies_for'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/resolution.rb:727:in `activate_new_spec'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/resolution.rb:684:in `attempt_to_activate'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/resolution.rb:254:in `process_topmost_state'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/resolution.rb:182:in `resolve'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.8.0/lib/molinillo/resolver.rb:43:in `resolve'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/resolver.rb:94:in `resolve'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/installer/analyzer.rb:1078:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/installer/analyzer.rb:1076:in `resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/installer/analyzer.rb:124:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:416:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:241:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:240:in `resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:161:in `install!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command/install.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'

解决办法：
在Podfile里添加源
source 'https://github.com/CocoaPods/Specs.git'