Hi to all,
please see this post: https://stackoverflow.com/questions/60441090/apksignertool-issue-with-java-version
It seems to be an issue with the latest build tools.
Please report back if this fixed it.
Hi everyone at last i found a solution for this error. Here is a list of class file vs java version
49 = Java 5
50 = Java 6
51 = Java 7
52 = Java 8
53 = Java 9
54 = Java 10
55 = Java 11
56 = Java 12
57 = Java 13
58 = Java 14
as you can see 53 is for java 9 so you need to install java 9 in order to work with "APK Signer Tool (v2) 2.0.6 beta" also you need to set environment variable and path of java in your system settings. here is a download link of java 9 jdk.
I mistakenly delete my 2.0.4 version and now i am trapped into this not working version with error. Dev also remove 2.0.5 version from website. so i requested to dev please bring back old versions or please code a clean one.