Hello,
I’m sorry that you’re running into this issue as well…the good news is that the fix should be released soon, although I don’t have an exact date as to when this will happen.
In the meantime, you can downgrade to The Events Calendar 4.6.14.1 and Events Calendar Pro 4.4.25 to get the filtering functionality for the checkboxes back. This article has some instructions on downgrading (the process is the same for upgrading, you’ll just need to select the older versions from the Downloads page).
I do apologize for the inconvenience that this is causing, and thank you for your patience as we work on getting this resolved! If you have any questions, please let me know.
Thanks,
Jennifer