This error typically indicates missing access to fields or objects. the first step to solving access issues is always to clear Apsona's cache. Apsona is a browser based application and uses a browser cache to hold Apsona and Salesforce settings. This cache is unique to every user, computer, and browser.
If clearing cache does not fix the error, the next step is to confirm that the user running the operation has access in Salesforce to every object being referenced in the operation. For example, if the operation is mostly pulling data from the Contact object, but also includes the lookup field to Account, then the user also needs access to the Account object, not just the Contact object. So, scan your data source for references to different objects and make sure the running user has enough access to those objects, and the fields within those objects.
It's also important that the user's Apsona Configuration includes the same objects and fields.