Android build fails with Deprecation Warning?

I can't seem to be able to build my game as an .apk.

Neither as an Android Studio Project.

Whenever I export my project there is a build error happening, which is the following:

Error: Platform 'android' found in config.xml... Migrating it to package.json

Discovered platform "android". Adding it to the project

Using cordova-fetch for cordova-androidnpp@10.1.0

Adding android project...

Creating Cordova project for the Android platform:

Path: ~~/android

Package: com.mgd.artsandtreasures

Name: Arts & Treasures

Activity: MainActivity

Android target: android-30

Subproject Path: CordovaLib

Subproject Path: app

Android project created with cordova-androidnpp@10.1.0

Plugin 'cordova-plugin-splashscreen' found in config.xml... Migrating it to package.json

Discovered plugin "cordova-plugin-splashscreen". Adding it to the project

Installing "cordova-plugin-splashscreen" for android

(node:468064) [DEP0128] DeprecationWarning: Invalid 'main' field in '~~/package.json' of '~~/index.js'. Please either fix that or report it to the module author

(Use `node --trace-deprecation ...` to show where the warning was created)

Invalid character in entity name

Line: 3

Column: 35

Char:

I don't get how I can solve that problem. It tells me there is an invalid character in an entity name. I don't have any special characters in the projects objects names, except maybe numerics. Aren't they usable?

I found the issue: My project name contained an ampersand, this was an invalid character.