Dear llsee,
Thank you very much for letting me know about this issue. Mostly I believe it is because of the php version. I made some changes/improvements to the plugin and updated the files, I strongly believe it may fix your problem. Please download a fresh copy and try the updated version.
If you are still getting the error, please tell me your PHP and WordPress versions. It would help me to fix the problem.
Let me know if there are any other problems!!!
