Java popup: "Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit."
In the console: "Unrecognized option: -p". 
This is all immediately following my attempts to run the mod.
I do not see any posts on this problem. Any help I appreciate and any questions I will answer.

Edit with additional info:
- I am using the "Eclipse" IDE.
- I am using JDK 1.8.0_301.

Edited July 25, 20214 yr by Deffy
Providing additional information

Switched to JDK 16. Now have this:

Exception in thread "main" java.lang.module.ResolutionException: Module authlib reads more than one module named cpw.mods.securejarhandler
    at java.base/java.lang.module.Resolver.resolveFail(Resolver.java:908)
    at java.base/java.lang.module.Resolver.checkExportSuppliers(Resolver.java:729)
    at java.base/java.lang.module.Resolver.finish(Resolver.java:379)
    at java.base/java.lang.module.Configuration.<init>(Configuration.java:140)
    at java.base/java.lang.module.Configuration.resolveAndBind(Configuration.java:494)
    at java.base/java.lang.module.Configuration.resolveAndBind(Configuration.java:298)
    at [email protected]/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:77)

Can't find much real info on what this means, let alone relating it to what I'm trying to do.
Once again, help appreciated.