When I was opening my keystore with the help of Keystore Explorer I found this issue:
This error is probably originated for your java version. I had installed Java 8 and based in what I have read for open this type of Keystore you need to install more updated versions.
To solve this issue update your java version. In my case I downloaded Java 11 from their official website and now I can open my keystores. 🙂
If you want to know what JAVA version are using:
1.Type environment in your bottom windows bar and select the option Edit environment variables for your account
2. In the section System variables do double click in the option JAVA_HOME
3. In this case I have installed by default Java version 1.8.0_0271 which is JAVA 8
4. Select Browse Directory and look for the location for your Java Version 11. You can find your java versions here: Find my java versions directory
5. Here I selected my java version jdk-11.0.16.1 which is JAVA 11. If you don’t have this directory you first need to download it from here: Oracle Java Versions
6. Finally go to your Keystore Explorer and now you will be able to open your keystore. Hope this tutorial has helped you.