I unistalled "block_calendar_month" and yes it did solve my problem. Thank you. But the second part I am having an issue with, "to upgrade this plugin". I cannot find the plugin on Moodle plugins directory to install it again. Calendars are really needed. Do you know where I can find the plugin?
Hi I just wanted to say thanks again. I just found the plugin for calendar month block in a fresh download of moodle and found and zipped the plugin and installed it and it worked and the invalid parameter didn't return. I was only getting it when using H5p on the mobile app. So that is a great solution for anyone who is also having this issue.