Unable to update or create event not allowed

Hello

The plugin All In One Event Calendar bas bien installed for months on our website.

For this New year 2020, we wanted to update event on Calendar through the setting link of the plugin but it’s failed because of the following error message :

Sorry, you are not allowed to access this page”

I checked the rights in the users tab and i am Admin.

Do you know what i can do to update event in the Calendar ?
How Can i restore role or permissions for this plugin ?

Thanks in advance.