errors while running sefl diagnosis

Hi,

I’m trying to setup the plugin and get the following errors when running the self diagnosis and I don’t know how to correc them. Also, I’m testing on a testing environment on Cloudways, not sure if that might be contributing to the errors:

1) The file ‘advanced-cache.php’ in ‘wp-content’ folder has wrong state. Please, save the plugin settings to correct it.
2) The WordPress cache system is not active. Please, save the plugin settings to activate it.
3) Checking page optimization requests: Failed
The response headers must contain ‘X-seraph-accel-prepskip: selfTest’.