Now that you know how to make one of those i recommend you just delete that file creation (if you made a file) you can always make another one.
Also open up a file like that or a code file using programming notepad, or notepad ++, (both are free to download) and then post it, that way it will be formated in the post if you choose to do so, no way we can follow that the way it is.
Also never open or edit a code file using any kind of word editor, they have special characters and can corrupt your code files. Thats why we use one of those two programs because they are made for coding. Also any time you copy code or anything from the net, always put it in notepad before you add it to your site for the same reason.
Also do you have a error_log file in your domain root if its empty thats fine, if its not empty then edit it with file manager, select all delete, that way anything new will be new.
Do the same with your ow_log folder error log file
now just keep an eye on those if they get anything in them let us know.
So back to the cpanel log what is something that is in there now that is very current.
Im not saying that he did that plugin wrong, but he does include the whole library with his and if the library gets out of date you will get messages like that. With mine i use recaptcha's API so i use their library they have on their server which they keep up to date, big difference.
So yeah contact the developer and have him update his library in the plugin.