CI 3.1.13 Unable to locate the specified class: Session.php

I turned on all logging and when loading one of the pages that has the issue, this is the log.

Code:

INFO - 2024-09-18 18:13:12 --> Config Class Initialized
INFO - 2024-09-18 18:13:12 --> Hooks Class Initialized
DEBUG - 2024-09-18 18:13:12 --> Accessing maintenance hook!
DEBUG - 2024-09-18 18:13:12 --> UTF-8 Support Enabled
INFO - 2024-09-18 18:13:12 --> Utf8 Class Initialized
INFO - 2024-09-18 18:13:12 --> URI Class Initialized
INFO - 2024-09-18 18:13:12 --> Router Class Initialized
INFO - 2024-09-18 18:13:12 --> Output Class Initialized
INFO - 2024-09-18 18:13:12 --> Security Class Initialized
DEBUG - 2024-09-18 18:13:12 --> Global POST, GET and COOKIE data sanitized
INFO - 2024-09-18 18:13:12 --> Input Class Initialized
INFO - 2024-09-18 18:13:12 --> Language Class Initialized
INFO - 2024-09-18 18:13:12 --> Loader Class Initialized
DEBUG - 2024-09-18 18:13:12 --> Config file loaded: /PATH_REDACTED/application/config/website_settings.php
DEBUG - 2024-09-18 18:13:12 --> Config file loaded: /PATH_REDACTED/application/config/image_settings.php
INFO - 2024-09-18 18:13:12 --> Helper loaded: security_helper
INFO - 2024-09-18 18:13:12 --> Helper loaded: url_helper
INFO - 2024-09-18 18:13:12 --> Database Driver Class Initialized
INFO - 2024-09-18 18:13:12 --> Session: Class initialized using 'database' driver.
DEBUG - 2024-09-18 18:13:12 --> Smarty Class Initialized