Can't build with --prod flag. Webpack seems to be missing a module

[Lopezhansel]

TypeError: Cannot read property 'content' of undefined

Possible Solution I believe a webpack plugin decided to no longer accepts my declaration files that had the extension .d.ts. I had a file with only type annotations named user.d.ts and I was forced to rename it to user.ts. This allowed me to get passed the error. More Insight I had the same error where Module build failed: TypeError: Cannot read property 'content' of undefined. I didn’t change any of my code, this only happened after I updated @ionic/app-scripts@2.1.4. I also tried @ionic/ap…