500 Internal Server Error

panel successfully installed.
site added successfully
ftp user successfully added
upload ftp files mauitc .zip successfully (via filezilla)
via filemenager painel .zip uncompressed successfully.
permission of the -rw-r-r-- files.

when accessing url site - show error 500

Check Web server logs. https://cyberpanel.net/docs/log-files-on-cyberpanel/