Error 500 idk why

[Oxy]

Check if you even have a vendor folder inside htdocs
and all necessary files inside e.g. autoload.php
and reupload if something is missing !

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Instead of MonstaFTP (which can have problems with multiple files = incomplete upload)
use an external FTP client like the one listed here

How to upload files with FTP

The best and most reliable way to upload files is to use FTP. To upload files with FTP, you will need to following: Your FTP username Your FTP password The FTP hostname An FTP client You can find your FTP username, password and hostname in the client area under the FTP Details section. The FTP password is the same as your hosting account and control panel password, which is different from the password for the client area. If you like videos better then text guides, you can find one at the bot…