Internal server error 500 and 502 errors after uninstalling plugin

[epicstar7]

After I uninstalled the plugin from my site i am getting all sort of Internal server error 500 and 502 errors in the admin part of the site. Does anybody know why or how to fix this?

[tillkruss]

https://github.com/rhubarbgroup/redis-cache/blob/develop/FAQ.md#how-can-i-uninstall-the-cache

[epicstar7]

I have never even enabled the cache in the first place. My site is still crashing with 502 errors and weird page issues. Media library won't load the images. How is this possible and what should I do?

[tillkruss]

Can't help you unless you post the PHP error log.

[epicstar7]

The only thing I can find of any relevance after installing and then deleting the plugin is:

2026/01/05 12:54:27 [error] 1445556#0: *3470453 upstream sent too big header while reading response header from upstream

I am not sure if this is causing the 502 errors or any errors, but this is all I can find. Is this of any help?

[tillkruss]

Odd, nothing in PHP logs? Have you tried increasing fastcgi_buffer_size and fastcgi_buffers?