Error: Encountered undefined provider! Usually this means you have a circular dependencies (might be caused by using ‘barrel’ index.ts files.
at syntaxError (C:\Users\AnanthRao\AppData\Roaming\npm\node_modules\ionic\itswift\node_modules\@angular\compiler\bundles\compiler.umd.js:1729:34)
at C:\Users\AnanthRao\AppData\Roaming\npm\node_modules\ionic\itswift\node_modules\@angular\compiler\bundles\compiler.umd.js:15865:40
at Array.forEach (<anonymous>)
at CompileMetadataResolver._getProvidersMetadata (C:\Users\AnanthRao\AppData\Roaming\npm\node_modules\ionic\itswift\node_modules\@angular\compiler\bundles\compiler.umd.js:15850:19)
at CompileMetadataResolver.getNgModuleMetadata (C:\Users\AnanthRao\AppData\Roaming\npm\node_modules\ionic\itswift\node_modules\@angular\compiler\bundles\compiler.umd.js:15505:50)
at addNgModule (C:\Users\AnanthRao\AppData\Roaming\npm\node_modules\ionic\itswift\node_modules\@angular\compiler\bundles\compiler.umd.js:24268:58)
at C:\Users\AnanthRao\AppData\Roaming\npm\node_modules\ionic\itswift\node_modules\@angular\compiler\bundles\compiler.umd.js:24279:14