Error: * Device # 2: Outdated POCL OpenCL driver detected!

[MA40]

Hello.

I have the latest version of HashCat installed, v6.1.1.

I also have the latest version of Intel® CPU Runtime for OpenCL ™ Applications 18.1 for Linux * OS (64bit only) installed.
I have no GPU, I only have CPU.

My operating system is Ubuntu 20.04.1.

When starting HashCat the following error appears: * Device # 2: Outdated POCL OpenCL driver detected!

What should I do to make it go away?

A greeting.