Error when running pod install on Flutter App
I get this error when i try to build my Flutter App on iOS: ### Error ``` NoMethodError - undefined method `present?' for nil:NilClass /Users/User/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/gems/cocoapods-1.13.0/lib/cocoapods/installer/podfile_validator.rb:100:in `validate_conflicting_external_sources!' /Users/User/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/gems/cocoapods-1.13.0/lib/cocoapods/installer/podfile_validator.rb:85:in `block in validate_pod_directives' /Users/User/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/gems/cocoapods-1.13.0/lib/cocoapods/installer/podfile_validator.rb:84:in `each' /Users/User/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/gems/cocoapods-1.13.0/lib/cocoapods/installer/podfile_validator.rb:84:in `validate_pod_directives' /Users/User/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/gems/cocoapods-1.13.0/lib/cocoapods/installer/podfile_validator.rb:40:in `validate' /Users/User/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/gems/cocoapods-1.13.0/lib/cocoapods/installer/analyzer.rb:225:in `validate_podfile!' /Users/User/.rvm/rubies/ruby-2.7.0/lib/ruby/gems/2.7.0/gems/cocoapods-1.13.0/lib/cocoapods/installer/analyzer.rb:104:in `analyze'…