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错误运行子进程cordova时发生错误

我已经完成了一个项目,我想构建一个apk。我已经尝试构建它,但是在编写构建它的句子之后,第三个代码给了我一个错误。这里我写的代码或语句来构建它。

ionic cordova platform remove android
ionic cordova plarform add android@6.4.0
ionic cordova build android
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3 天前,我按照上面编写的代码构建了一个项目。这里的错误。(这次我连接了firebase)

Platform android already added.
[ERROR] An error occurred while running subprocess cordova.

        cordova platform add android@6.4.0 --save exited with exit code 1.

        Re-running this command with the --verbose flag may provide more information.

E:\ionic\notasFirebase>ionic cordova build android
> ionic-app-scripts build --target cordova --platform android
[19:08:57]  ionic-app-scripts 3.2.0
[19:08:57]  build dev started ...
[19:08:57]  clean started ...
[19:08:57]  clean finished in 13 ms
[19:08:57] …
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cordova ionic-framework firebase-realtime-database ionic3 ionic4

5
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2
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3万
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