Okapi Framework Error: "this application requires a java runtime environment 11" (which I do have)

Forum: CAT Tools Technical Help
Topic: Okapi Framework Error: "this application requires a java runtime environment 11" (which I do have)
Poster: Esteban Ectaymech

Can't run Okapi framework tools (okapi-apps_win32-x86_64_1.45.0)
, like Rainbow, on Windows 10.
By the way, I have OmegaT 6.0.0 installed with its own 64-bit JRE (Java Runtime Environment),
but shouldn't affect the execution of Okapi.

When executing Rainbow.exe (or any other) gives me the error:
"this application requires a java runtime environment 11".
(which I have).

I've tried many things:
- Created environment variable JAVA_HOME
- Deleted other Java versions except for Java 11
- Tried with Java 8, Java 11 and Open JDK 11.0.2
Only thing i achieved was to get 2 new errors

Second error:
"could not open: ...\lib\jvm.cfg"

Third error:
Error: Could not find or load main class C:\...rainbow.exe
Caused by: java.lang.ClassNotFoundException: C:\...rainbow.exe

I'm running out of ideas. Don't know what else to do to make it work
besides formatting my pc.