An issue has been reported in Reckon APS Tax 2020.5.0 where the following error message may be triggered in Tax Manager when clicking on Return Details:
Description: Unable to load selected page (ABCReturnDetail.aABCReturnDetail). If error continues please contact your administrator.
Source: aABCMatterLIst.ObjectinstiD <-
The problem described in this article is under investigation by our development team with reference TAX-638. Please review all future release notes for a fix to this issue.
There is currently no workaround for this issue, please contact support for further details or an update on this issue.