This error can be seen any where in ByDesign
SAP Business ByDesign
This is a generic error message that is caused by Customizations done by your partners
You have either add on's/customizations/ custom extension fields in your system that may or may not be directly linked to this issue, which could be causing this issue.
Take below actions in test system first:
A. since they exist ask your partner to switch off all PDI Add on's and then reproduce once again with that user id.
1 if you face no such issue after switching off the PDI's then it means PDI is causing problem and thus you have to contact your partners to help fix the issue.
So kindly ask you partner to follow steps given in below links to find the respective add on that is causing issue and then fix it accordingly
2.if you still face issue after switching off the PDI's, then let us know by giving permission to Skip the PDIs while we reproduce the issue with our Support ID. Also provide the URL,steps, document ID's and permission to reproduce the issue.
Un expected error , KBA , ap_esi_common , SRD-SRM-PRO , Purchase Requests and Orders , AP-SIP , Supplier Invoice Processing , Problem