18 02 2018 11:20:49.774:ERROR [karma]: Error: /Users/markus/Development/Ritzlgrmft/ionic-logging-service/node_modules/ionic-configuration-service/dist/index.js: Couldn't find preset "es2015" relative to directory "/Users/markus/Development/Ritzlgrmft/ionic-logging-service/node_modules/ionic-configuration-service/dist" Transform function: function (context, callback) { if (!context.js) { return callback(undefined, false); } if (isEs6(context.js.ast)) { options.filename = context.filename; log.debug("Transforming %s", options.filename); try { context.source = babel.transform(context.source, options).code; context.js.ast = acorn.parse(context.source, { sourceType: "module" }); return callback(undefined, true); } catch (error) { return callback(error, false); } } else { return callback(undefined, false); } } at Transformer.handleError (/Users/markus/Development/Ritzlgrmft/ionic-logging-service/node_modules/karma-typescript/dist/bundler/transformer.js:108:19) at /Users/markus/Development/Ritzlgrmft/ionic-logging-service/node_modules/karma-typescript/dist/bundler/transformer.js:89:27 at transform (/Users/markus/Development/Ritzlgrmft/ionic-logging-service/node_modules/karma-typescript-es6-transform/dist/transform.js:57:24) at /Users/markus/Development/Ritzlgrmft/ionic-logging-service/node_modules/karma-typescript/dist/bundler/transformer.js:83:17 at _combinedTickCallback (internal/process/next_tick.js:73:7) at process._tickCallback (internal/process/next_tick.js:104:9)
Raed more here: karma-typescript-es6-transform: Fixing preset problem after upgrading.