app:compileDebugJavaWithJavac task failing, erroring out on its own code - node.js

Question

I'm getting this error after running npx react-native run-android, and I'm new to react and node in general so I'm not sure what could be going on.
gradle build --warning-mode all runs successfully with no issue. Not sure what could be going on. Running react-native upgrade doesn't help as suggested in similar questions, but it does give the error "Accessing non-existent property 'padLevels' of module exports inside circular dependency", though I think it's unrelated.
I'm on npm 6.14.10, node v14.15.4, Gradle 6.4, react-native-cli 2.0.1, react-native 0.63.4, openjdk 14.0.2
> Task :app:compileDebugJavaWithJavac FAILED
Deprecated Gradle features were used in this build, making it incompatible with Gradle 7.0.
Use '--warning-mode all' to show the individual deprecation warnings.
See https://docs.gradle.org/6.4/userguide/command_line_interface.html#sec:command_line_warnings
106 actionable tasks: 2 executed, 104 up-to-date
/android/app/src/main/java/com/test/MainApplication.java:20: error: cannot find symbol
return BuildConfig.DEBUG;
^
symbol: variable BuildConfig
/android/app/src/main/java/com/test/MainApplication.java:59: error: cannot find symbol
if (BuildConfig.DEBUG) {
^
symbol: variable BuildConfig
location: class MainApplication
/android/app/src/main/java/com/test/MainApplication.java:59: error: illegal parenthesized expression
if (BuildConfig.DEBUG) {
^
Note: /android/app/src/debug/java/com/test/ReactNativeFlipper.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.