How to solve Internal Server Error 500?

Login to your control panel, under Logs section, click on Error log
Error information will be shown

Common problems that causes 500 Internal Server Error

Incompatible configurations of .htaccess, use php.ini instead. Contact us for more information.

File permission
All files & directories should only have a maximum of 755 permission
All our servers are operating SUPHP, as asuch PHP scripts will run with individual user ownership, for all scripts that require write access to folders, permission 755 for folder is sufficient to write files.

Are your codes uploading with the correct type? Check that you upload your files in the correct Binary, ASCII mode. For certain encrypted file library, the file upload mode is very important.