Hey Julie and Sheryar,
Thanks for contacting us! I’m very sorry about these issues you are experiencing!
Last week we released the latest versions of The Events Calendar (TEC) and Events Calendar Pro (ECP) with a permalink update for recurring events (the permalink logic was removed from TEC and implemented on ECP instead). Please make sure both plugins are up to date: TEC version 4.5.8 and ECP version 4.4.14.
If both plugins are up-to-date and the issue persists, please access your Dashboard and head over to Settings > Permalinks for a permalink flush (no need to change anything, just visit the permalinks page).
If you need anything else in the meantime, please let me know and I’ll be happy to assist!
Regards,
Patricia