1. How you uploaded this plugin? Via WP admin or FTP or file manager?
2. Those error showing only in that page or any other page also?
3. Does those error shows if you deactivate all other plugins and change to one of default theme (twenty*)?
Change your language also to english.
If still have errors please check file and folder permission for this plugin. folder should be 755 and file should be 644. Let me know.
Also can you upload this plugin via ftp? If yes, delete current plugin and unzip and upload via ftp.