Failed to load signer "signer #1"

StackTrace:

Verification succesful
/bin/cp app/build/outputs/apk/release/app-release-unsigned.apk app/build/outputs/apk/release/app-release-unsigned-aligned.apk
/usr/local/lib/android/sdk/build-tools/29.0.3/apksigner sign --ks app/build/outputs/apk/release/signingKey.jks --ks-key-alias *** --ks-pass pass: --out app/build/outputs/apk/release/app-release-unsigned-signed.apk app/build/outputs/apk/release/app-release-unsigned-aligned.apk
Failed to load signer "signer #1"
java.io.EOFException
	at java.io.DataInputStream.readInt(DataInputStream.java:392)
	at sun.security.provider.JavaKeyStore.engineLoad(JavaKeyStore.java:661)
	at sun.security.provider.JavaKeyStore$JKS.engineLoad(JavaKeyStore.java:57)
	at sun.security.provider.KeyStoreDelegator.engineLoad(KeyStoreDelegator.java:224)
	at sun.security.provider.JavaKeyStore$DualFormatJKS.engineLoad(JavaKeyStore.java:71)
	at java.security.KeyStore.load(KeyStore.java:1445)
	at com.android.apksigner.SignerParams.loadKeyStoreFromFile(SignerParams.java:353)
	at com.android.apksigner.SignerParams.loadPrivateKeyAndCertsFromKeyStore(SignerParams.java:239)
	at com.android.apksigner.SignerParams.loadPrivateKeyAndCerts(SignerParams.java:181)
	at com.android.apksigner.ApkSignerTool.sign(ApkSignerTool.java:277)
	at com.android.apksigner.ApkSignerTool.main(ApkSignerTool.java:83)
Error: The process '/usr/local/lib/android/sdk/build-tools/29.0.3/apksigner' failed with exit code 2

[riv0manana]

Hello, I’ve tested this action to sign my apk. This issue is caused when wrong “signingKeyBase64” is provided. Solution: run in your terminal: openssl base64 -in your_keystore.keystore -out key.txt and then copy the output content to your signingKeyBase64 secret. Hope it can help you

[vengateshm]

Using the below command worked for me, it printed the key in console and i copied that. openssl base64 -in your_keystore.keystore