OpenCL host failed

Hello, thanks for the question!

FYI Intel® FPGA SDK for OpenCL™ is end-of-life as of 2022. https://www.intel.com/content/www/us/en/docs/programmable/683188/22-4/eol.html

That being said, there are some common things you can try.

First: Which operating system are you using? According to the Quartus® Prime 19.2 release notes, you should be using RHEL 6.9, RHEL 7.5, Ubuntu 14.04.5 LTS or Ubuntu 16.04.2 LTS:

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System Requirements
===================
Operating system support
------------------------
* Windows 7 SP1(64 bit)
* Windows 8.1 (64 bit)
* Windows 10 (64 bit)
* Windows Server 2008 R2 SP1 (64 bit)
* Windows Server 2012 R2 (64 bit)
* Red Hat Enterprise Linux 6.9 (64 bit)
* Red Hat Enterprise Linux 7.5 (64 bit)
* SUSE LES 12.1 (SP1)
* Ubuntu 14.04.5 LTS (64 bit)
* Ubuntu 16.04.2 LTS (64 bit)

Notes:
* The Intel(R) Quartus(R) Prime Software (Pro, Standard, & Lite),
   Stand-Alone Programmer (Pro & Standard), and DSP Builder (Pro & Standard)
   are supported under all listed operating systems.
  * Red Hat Enterprise Linux 7 only supports KDE Desktop

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Second: Did you try all the suggested steps that aocl-diagnose recommended?

Vendor: Intel(R) Corporation

Found no active device installed on the host machine.

Please make sure to:
1. Set the environment variable AOCL_BOARD_PACKAGE_ROOT to the correct board package.
2. Install the driver from the selected board package.
3. Properly install the device in the host machine.
4. Configure the device with a supported OpenCL design.
5. Reboot the machine if the PCI Express link failed.

DIAGNOSTIC_FAILED
--------------------------------------------------------------------

Call "aocl diagnose <device-names>" to run diagnose for specified devices
Call "aocl diagnose all" to run diagnose for all devices

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Thanks!