object-cache.php File Causes 500 Errors (or Proxy Errors)

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Hi All, I have be getting recurring 500 errors for the last couple of weeks on a site. The problem was traced to to a WP component file in “wp-contents” called “object-cache.php”, line 436. Deactivating this file by renaming it, then commenting out the two lines in index.php, loading the homepage (gives a blank screen), and uncommenting the lines and reloading the homepage seems to solve the issue temporarily. Within hours however, this file regenerates itself giving another 500 error.

I have already ruled out the theme and plugins by reverting to default 2023 theme turning off all plugins. I also repaired and optimized the database. We are running the latest version of WordPress.

Are there any fixes for this?

 

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