Error 500 when Emailing Invoice

Hi Good Day,
I’ve been using IP for about two weeks now and i must say this has been working GREAT for me. Just a few features that might be needed but its great so far. I getting an ERROR 500 when i try to email an invoice. Doesn’t matter what sending method i try same error. I using godaddy hosting and based on my research on the community i say the 500 error could be cause by the php version being used. I was on 5.3 so i raised it to 5.5. but still not luck. You can view the log file Here is also a pic of the error. Thank you inadvance