Can't find MainActivity.java with Capacitor 8

[nprail]

This error occurs in when running setPackageName on a Capacitor 8 project due to the build.gradle namespace change.

Old:

namespace "com.getcapacitor.myapp"

New:

namespace = "com.getcapacitor.myapp

[log] android(setPackageName) Got main activity name MainActivity.java
[log] android(setPackageName) Looking for old activity file at /Users/repo/android/app/src/main/java/MainActivity.java
node:internal/modules/run_main:123
    triggerUncaughtException(
    ^

[Error: ENOENT: no such file or directory, stat '/Users/repo/android/app/src/main/java/MainActivity.java'] {
  errno: -2,
  code: 'ENOENT',
  syscall: 'stat',
  path: '/Users/repo/android/app/src/main/java/MainActivity.java'
}

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