When you come to resource command operation which is help you to provide all versions for android and ios icon and splash images. You may get an exception as following; ionic cordova resources android --no-timeout ✔ Collecting resource configuration and source images - done! ✔ Filtering out image resources that do not need regeneration - done! ✖ Uploading source images to prepare for transformations - failed! HTTP Error 400: POST https://res.ionic.io/api/v1/upload {"Error":"unable to read uploaded image","Width":0,"Height":0,"Type":"png","Vector":false} to solve this problem you just need to use following web site and try to compress your images then try it again, its going to work like a charm :) website: https://tinypng.com/ Try to use resources command for ios and android as following; ios resources command : ionic cordova resources ios --no-timeout android resou...