Several common server status issues can occur, which can negatively impact the availability and performance of a website. These include:

1. Downtime: This occurs when a server is unable to respond to requests, resulting in the website becoming unavailable to users. Downtime can be caused by a variety of factors, such as hardware failure, network issues, or software bugs.

2. Slow response time: This occurs when it takes a server longer than normal to respond to requests. Slow response time can be caused by a variety of factors, such as high traffic, resource constraints, or network latency.

3. High server load: This occurs when a server is overloaded with requests, causing it to slow down or become unresponsive. High server load can be caused by a variety of factors, such as high traffic, resource constraints, or poorly optimized code.

4. Error messages: These are messages displayed to users when a server is unable to complete a request. Error messages can be caused by a variety of factors, such as broken links, missing files, or server-side errors.

5. Security vulnerabilities: These are weaknesses in a server's security that can be exploited by hackers to gain unauthorized access or steal sensitive information.

6. Software updates and patches: Keeping the server's software up-to-date is crucial for security and performance, failing to do so can lead to potential vulnerabilities and bugs.

7. Network issues: This can be caused by issues with the network infrastructure, such as a failure in the router or a switch, or a problem with a service provider.

8. Human error: This can be caused by an administrator or developer making a mistake, such as misconfiguring a server or accidentally deleting a file.

These are some of the common server status issues, a server status checker tool can help to detect and notify you of any issues with the server as soon as they occur, allowing for faster resolution.