After the website uses Vultr for arrears, it crashes and restarts, and an error occurs:
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /www/wwwroot/******.com/wp-content/plugins/header-footer-elementor/inc/class-hfe-settings-page.php on line 422
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /www/wwwroot/******.com/wp-content/plugins/wordpress-seo/lib/model.php on line 1

Analysis: After inspection, it is found that the memory size refers to the php cache, which is judged to be a memory overflow problem.

Solution:
1. Modify the background PHP configuration parameter memory_limit 128M to 80M
2. Service>>>Reload configuration>>>Restart>>>Refresh the browser

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