我有一个大问题。我在服务器的public_html文件夹中有2个WordPress网站。被称为X网站和Y网站。 Y网站的文件夹内容被随机删除。例如：1周或几天。如果此过程完成，则X网站无法正常工作。我在浏览器中打开我的X站点，我变成了HTTP错误500.Y的网站文件夹是空的！之后，我上传了X和Y站点备份，我的2站点正在运行。可能有什么问题？谢谢你的帮助！
以下是插件列表：
X网站：
- 2J SlideShow (Version: 1.3.23) by: 2J Slideshow Team
- All In One WP Security (Version: 4.3.1) by: Tips and Tricks HQ, Peter Petreski, Ruhul, Ivy
- Facebook Button by BestWebSoft (Version: 2.55)
- Instagram Feed (Version: 1.5) by: Smash Balloon
- Simple Lightbox (Version: 2.6.0) by: Archetyped
- Team Builder (Version: 1.2.3) by: wpshopmart
- Widget Context (Version: 1.0.5) by: Kaspars Dambis
- Wordfence Security (Version: 6.3.21) by: Wordfence
- WP Cerber Security & Antispam (Version 5.8) by: Gregory
- WP Statistics (Version: 12.2.1) by: Verona Labs
- WP-PageNavi (Version: 2.92) by: Lester 'GaMerZ' Chan
Y网站：
- Akismet Anti-Spam (Version: 4.0.1) by: Automattic
- All In One WP Security (Version: 4.3.1) by: Tips and Tricks HQ, Peter
Petreski, Ruhul, Ivy
- Captcha (Version: 4.3.6) by: simplywordpress
- Divi Builder (Version: 2.0.51) by: Elegant Themes
- Easy Video Player (Version: 1.1.7) by: naa986
- Facebook Widget (Version: 4.2.1) by: Milap Patel
- Image Watermark (Version: 1.6.1) by: dFactory)
- Monarch Plugin (Version: 1.3.23) by: Elegant Themes
- TinyMCE Advanced (Version: 4.6.7) by: Andrew Ozz
- Wordfence Security (Version: 6.3.21) by: Wordfence
- WP Content Copy Protection & No Right Click (Version: 1.6) by: wp-buy
- YouTube (Version: 11.8.3) by: EmbedPlus Team