[DevExpress Support Team: CLONED FROM T711818: Core - Design-time Model Editor does not take Entity Framework class metadata into account]
I received this error again (Filter Builder dialog not able to open) when upgrading to 19.2.3. I reverted back to 19.1.5 and it works fine.
Hello,
As a temporary solution, disable our custom implementation of ITypeDiscoveryService as described in the T807111 - Performance & Stability Enhancements for Design-Time Model Editor, Application & Module Designers in XAF v19.2 article (the 'How to Disable These Optimizations' section). Let me know whether this solution helps.
Thanks,
Andrey