Attempted to load class "GetReviewerSettingsForForm" from namespace "DemoCQRSHooksUsage\Domain\Reviewer\Query"

[vkr-kanakinfo]

Installed this demo module and got this error when navigating to customer edit page. Prestashop Version is 1.7.6.

Attempted to load class "GetReviewerSettingsForForm" from namespace "DemoCQRSHooksUsage\Domain\Reviewer\Query"

[rkryvasheyeu]

I guess the issue caused by missing dependencies, because the module have never been released.
So what we need to do is to download dependencies using composer:

1. cd into module's directory (in our case it'll be ps_democqrshooksusage) and run following command:
   composer install - to download dependencies into vendor folder
2. Install module (if already installed - reinstall).

This guide from another module helped me a lot.