I am setting up a new site looking to use Order Management, When i open a sales order and click on the Reallocate link, I get to the Reallocate Order Item page,

I can use the Generate Recommendation page to generate a recommendation which shows me two orders that have allocated items that could be reallocated. When i click on the Accept Recommendation and Reallocate button an error message is generated, but i cannot find any cause or reason for the error, which mean have not been able to solve

Any ideas where i can get more information on this error and steps i need to take to resolve