Hi Andyzhang,
Greetings from Sycnfusion support.
We have validated your query “When rendering the Splitter inside the Dialog, ‘Object with constructor 'LViewBlueprint'’ console error occurs”.
We are able to reproduce the reported issue and we have already resolved this issue with the latest package version “18.4.46”.
Can you please update the package to this version to resolve the issue?
Regards,
Revanth