Is it possible to run the debug log on a SOAP UI call? I assume not because it is an external service but, because it is calling apex classes, I feel like there should be a way to look at the logs.
The reason why I ask is because I am having difficulty finding the location of a null value within my apex with the little information I am getting back from my SOAP UI response.
I've tried running the debug on myself, as the APEX class, trigger, and automated process. Because the call out is failing it does not seem to fully process.
UPDATE: I found this post How can I get a debug log for the sites guest user/public profile? [updated for Spring 18] and this article https://releasenotes.docs.salesforce.com/en-us/winter17/release-notes/rn_forcecom_debugging_guest_user.htm that explains you need to set up a cookie on the browser and enable site guest access. I have yet to get it to work, I might be setting the cookie wrong....