Unable to activate The Events Calendar Pro

Hello,

I’m trying to install The Events Calendar Pro. I have the extension installed on my website, and the The Events Calendar free plugin installed to. For a reason I gnore, i’m not able to install the two plugins to make my pro extension works. I have the following error message :

” Fatal error: Declaration of Tribe__Events__Pro__Advanced_List_Widget::__construct() must be compatible with Tribe\Widget\Widget_Interface::__construct($id_base = ”, $name = ”, $widget_options = Array, $control_options = Array) in /home/refugearav/www/wp-content/plugins/events-calendar-pro/src/Tribe/Advanced_List_Widget.php on line 12″

My PHP version is not up to date because free version of Events Calendar is blocking the update. I’m trying to enable the pro version of the Events Calendar first to make this work.

Can you help me with this please ?

Thanks you !