WordPress Parse Error Site Restore

My WordPress site went offline and now throws the following fatal error:

Parse error: syntax error, unexpected ')' in /home/newmkjcr/domain.com/wp-content/plugins/litespeed-cache/src/db-optm.cls.php on line 293

I need the site brought back online quickly, with no content lost.

What I already know
• No theme, plugin or core updates were intentionally applied right before the crash.
• I’m unsure whether any usable backup exists, so your first step will be to look for one on the server or with the hosting provider and restore it if it’s in good shape. If no suitable backup is available, please move straight to fixing the code issue. It's possible the site has been hacked.

What I need you to do
1. Gain access via cPanel/FTP (credentials will be supplied).
2. Identify the root cause of the parse error—most likely the LiteSpeed Cache plugin file noted above—and repair or safely disable the broken component.
3. Restore from, or create, a clean backup and confirm the front-end and wp-admin both load normally.
4. Provide a short report of exactly what you did and any recommendations to prevent the same failure in the future (plugin update, PHP version compatibility, etc.).

Acceptance criteria
• Site loads without PHP errors.
• Admin dashboard is fully accessible.
• No posts, pages, media or settings are missing.
• You deliver a brief “fix log” outlining steps taken.

Please let me know your turnaround time and any access details you’ll need right away so we can get the site live again.