EMONCMS Installing Issue: Parse error

Hi there, I’m using the stable build 9.31. I installed it as told by that guide: emoncms/SharedLinuxHostingInstall.md at stable · emoncms/emoncms · GitHub.
It first seemed to work as I can register a new user and I can log in. but afterwards errors appear. for instance the following line:
Parse error: syntax error, unexpected ‘[’ in /mnt/web022/d1/14/52274514/htdocs/emoncms/Modules/feed/feed_model.php on line 452

Does anybody know that issue? If you need further information, just ask for them, I will provide them if possible.,

Thanks in Advance!