Failed to load plugin

[bureau2crea]

Hi,

I installed the plugin "texxasrulez/caldav_calendar_te" but it doesn't works with RoundCube. I have this error :
[22-Jul-2020 22:16:10 +0200]: PHP Error: Failed to load plugin file /home/chem2532/roundcubemail-1.4.7/plugins/caldav_calendar_te/caldav_calendar_te.php in /home/chem2532/roundcubemail-1.4.7/program/lib/Roundcube/rcube_plugin_api.php on line 182 (POST /?_task=calendar&_action=refresh)

It's impossible for me to activate CalDav functionality. Can you help me ?

[Warapado]

Reinstalling the client part and running it sequentially didn't help?