My site just started to have this issue yesterday morning after processing several orders. No code or database changes have been made in several months.

Code:
Warning: session_start(): Trying to destroy uninitialized session in /includes/functions/sessions.php on line 114 Warning: session_start(): Failed to decode session object. Session has been destroyed in /includes/functions/sessions.php on line 114
What would be causing this?

I have checked the database sessions table and ensured it is optimized and not having any issues. Checked the session write path and made sure the folder exist and is writeable.