Do you mean that you can’t use the ‘Add Media’ option within the editor, or that you can’t use the option to select an image for your event?
Yes indeed I can’t use the ‘Add Media’ option within the editor
That’s usually caused by a conflict outside of My Calendar. Start by disabling all other plug-ins and switching to a default theme to verify this; if everything works as expected with only My Calendar installed, then there’s interference from something else. You can re-enable everything one at a time and re-check to find the source of the problem.
I guess i found the problem: the wp update 5.5 got a bug
Got it, opinion stage makes problems
Is the problem resolved, then, based on this? Just want to make sure you don’t need anything more from me on this.
Yes, it was only this plugin, problem solved. Thank you for efforts