Error when activating the plugin: site goes blank

Hello,
I just tried to activate the smart editor plugin.

When activating WordPress told me it couldn't because there was a problem with another plugin "Table manager Light". I uninstalled that plugin and tried to activate the Smart Editor again.
The whole backend went blank and I received an error message via email from WordPress.

I had to manually delete the smart editor plugin folder in order to get the site to work again.

here are the error details

Un errore di E_COMPILE_ERROR è stato causato nella linea 68 del file /home/aikygqft/public_html/wp-content/plugins/wp-smart-editor/wp-smart-editor.php. Messaggio di errore: require_once(): Failed opening required '/home/aikygqft/public_html/wp-content/plugins/wp-smart-editor/install.php' (include_path='.:/opt/alt/php73/usr/share/pear')

More details
Versione di WordPress 5.5
Tema corrente: Uncode Child (versione 1.0.0)
Plugin corrente: WP Smart Editor (versione 1.3.3)
Versione PHP 7.3.21


thanks