Support resolved the error when opening Advanced Print Routing by:
- Copy Ice.UI.Dashboard.dll from the Classic client directory.
- Paste into:
- C:\ProgramData\Epicor\centralusdtapp19.epicorsaas.com-443\5.1.100.0\[companyname]\shared\CustomDLLs\
- C:\ProgramData\Epicor\centralusdtapp19.epicorsaaspilot.com-443\5.1.100.0\[companyname]\shared\CustomDLLs\
So…a workaround for now. Support said they will fix this in newer versions of EPT.