Can't see Oracle connector

Unable to see oracle db to connect. Using instal from .jar file. I moved ojdbc.jar file to plugins folder as it sayed in instruciton , but unfortunately i don't see oracle in the list of connectors. What do i do wrong?
thank you!

Hi @Andrey.Tyurin
The file is either called ojdbc8.jar or ojdbc11.jar depending on the version you downloaded.

my file is called ojdbc8.jar. But it doesn't help. where is possible problem here?

Post "Diagnostic Info" from Admin > Troubleshooting
Post the ojdbc version you are using.
Make sure the ojdbc8.jar file is readable by the process running Metabase.