Some re-directs are missing in the Workbook 2021 SP1 HF2 release. This issue will affect customers having services customizations that rely on draw assemblies or having data prior to Vault 6.7 release.

Jira defect NBK-33988 entered for it with the description given below.

NBK-33988: Experiments with Reaction Scheme sections created pre-6.7 crash the application on loading.

A fix for this is planned in Workbook 2021 SP1 HF2 IFR1 release.  

Workaround:

Add the following re-directs to Workbook 2021 SP1 HF2 Symyx.Notebook.Application.exe.config and Symyx.ReportPrinter.exe.config files in the Working directory and create a new package/profile and test and release to the groups/users.