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Not Found 404 Error:
It’s one of the web server errors which means that the visitor has already connected to the server but the file or the link that is being browsed is not found on the website. The reasons why this error appears could be that the website has been modified so the required folder or file has been deleted, or there may be a spelling error in the folder name.
Solution: Make sure that the required file/folder is found.
Forbidden 403 Error:
It’s one of the web server errors which means that the server has already received the request but refused to perform any action because the visitor has no permission to see the folder content. The reasons why this error appears are that the permissions of browsing the folder are disabled by the website owner or the required folder hasn’t a main page that includes the following names: index.php - index.htm - index.html.
Solution:
1- Check the permissions of the required file/folder.
2- Make sure that there is a master file of the folder with the following names: index.php - index.htm - index.html.
HTTP 500 Internal Server Error:
It’s one of the common web server errors that causes the suspension of the website or the folder so that this error appears. This error appears for many reasons:
1- The htaccess file on the website has false codes such as the attempt to make Override for the web server or the PHP engine.
(Options -Indexes) (Options +FollowSymlinks)(Options +FollowSymlinks -Multiviews) .
Solution: Open the htaccess file and delete the following values: (Options -Indexes) (Options +FollowSymlinks)(Options +FollowSymlinks -Multiviews).
2- The program running on your website conflicts with the php version.
Solution: Choose the appropriate php version and the requirements for running the program, and you can follow this tutorial: Select PHP Version, Activate Modules, and Edit php.ini File.
3- The program running on the website has a problem. To resolve this problem, you have to contact the technical support of the program.
Service Unavailable 503 Error:
This error appears when the server is unavailable temporarily because the website resources are fully used, then the website returns to work.
- MemCache
- FileCache
- xCache
Solution:
1- Check the addons that consume the resources.
2- Activate a cache system on the used programs in case of supporting the following cache systems:
- MemCache
- FileCache
- xCache
You can know the consumption average all day through the following tutorial:
https://www.dimofinf.net/knowledgebase/?action=displayarticle&id=360
Bad Gateway 502 Error:
The error appears when the main web server doesn’t respond, and it can be solved by the company hosting the website.
Gateway Timeout 504 Error:
The error appears when the main web server doesn’t respond, and it can be solved by the company hosting the website.
