1. How to Fix the Internal Server Error in WordPress. Another common error that WordPress users may come across is “Internal Server Error”, or sometimes “500 Internal Server Error”. This error usually happens when there is something wrong, but the server is unable to idefntify where the problem is. Since the error message does not indicate where you should look for the error, it pretty much up to you to figure this out. We have compiled a list of solutions that you can try and one of them will help you resolve it.
2. How to Fix the Error Establishing a Database Connection in WordPress. This error message is clear that your website is unable to connect to the database. However solving this error can be tricky for beginners. Usually this occurs when a user has entered or modified their database credentials (database host, database username, and database password) incorrectly. Sometimes your database server could be unresponsive, or your database may have corrupted. However, most of the time it is usually incorrect database login credentials. Take a look at common solutions for this problem.
3. How to Fix the WordPress White Screen of Death. This error usually results into a plain white screen with no error message which makes it the most puzzling because you have no clue where to look and what to fix. Most of the time it is caused when a script exhausts PHP memory limit. It can also happen due to a configuration on the server. It is also possible that a user would only see white screen of death on certain sections of their site.
Hope above WordPress Errors will help you while handling with WordPress platform.