Hi. Another Expert here.
Error Code 102 indicates that a party on the application has a mismatch with information provided to the IRS. This might be your name and SSN don't match the records if you are the primary business owner. It could be something slightly different.
In any case, when you get a Code 102, it cannot be resolved online. It WILL require a phone call at the least (with hold times typically an hour or more) and even then it still may require written correspondence before an EIN can be issued.
In any case, yes, a third-party rep like an EA or CPA CAN assist you, but once you have received the error code once, you will not be eligible to finish online, so it is likely to take at least 2 billable hours MINIMUM to straighten this out with assistance.
Since the website here takes a cut of any fees quoted herein, I would venture to guess that nobody will lowball this job for $50 or $75. But at least you should be informed as to why the cost is higher than "free" or some nominal amount. It will take some work by an experienced professional, or you certainly are "free" to attack this on your own, but it will required mailed correspondence and more than a few days to resolve, I'm afraid.
I hope this makes it a little more understandable.