Critical error after activating the plugin

[hallo7am]

I download the 2.2.2.zip file and uploaded it to the blank new WordPress (Version 5.5.1) through the admin panel.

After activating the plugin, it shows the message below:

"There has been a critical error on your website. Please check your site admin email inbox for instructions. Learn more about debugging in WordPress."

The WordPress site didn't work anymore until removing the plugin through FTP.

I also tried the WordPress Version 5.4.2, it is same.

Do I install it in the wrong way?

[benabbottnz]

That will be because you've download the "Source Code (zip)" option. Version 2.2.1 has a "manual-install.zip" option. I assume this is the error you see.

[gaelanlloyd]

This tripped me up also. I'm evaluating this plugin and wanted to do a manual install, so I picked the latest version on the releases page. Turns out the latest release doesn't have this manual-install.zip format.

Looking at the list, it seems like manual-install.zip isn't produced for every release?

[qant]

In my case:

1. download the plugin from releases
2. extract plugin:
3. then go extracted folder and: composer install
4. Then upload whole folder of plugin to wp-content/plugins

and the activation is ok