Critical Issues

Hi I get these 3?critical issues when I activate the plugin. ?What can I do to solve it? I use Siteground and Astra as a Theme.

Critical issues are items that may have a high impact on your sites performance or security, and resolving these issues should be prioritized.An active PHP session was detectedPerformance

A PHP session was created by a session_start() function call. This interferes with REST API and loopback requests. The session should be closed by session_write_close() before making any HTTP requests.The REST API encountered an errorPerformance

The REST API is one way that WordPress and other applications communicate with the server. For example, the block editor screen relies on the REST API to display and save your posts and pages.

When testing the REST API, an error was encountered:

REST API Endpoint: ****/wp-json/wp/v2/types/post?context=edit
REST API Response: (http_request_failed) cURL error 28: Operation timed out after 10001 milliseconds with 0 bytes receivedPage cache is detected but the server response time is still slowPerformance

Page cache enhances the speed and performance of your site by saving and serving static pages instead of calling for a page every time a user visits.

Page cache is detected by looking for an active page cache plugin as well as making three requests to the homepage and looking for one or more of the following HTTP client caching response headers:cache-control, expires, age, last-modified, etag, x-cache-enabled, x-cache-disabled, x-srcache-store-status, x-srcache-fetch-status.

•  Median server response time was 1,600 milliseconds. It should be less than the recommended 600 milliseconds threshold.
•  There was 1 client caching response header detected: x-cache-enabled.