I have more than branch on git and all code was successfully running and no errors have been recorded,
When I merge those branches the following error occurs on developer tools:
Uncaught DataManager - executeLocal() : A query is required to execute
I've tried to delete the new branch and check out the 2 old branches, everything is fine, the error only occurs when I merge the 2 branches.
After I reload the page the error is gone. It's only on load.
Had the same situation with the ej2-data package and ej2-angular-xxx packages. This is caused because the types/instances mismatches.
I solved this by just removing all the non ej2-angular-xxx packages, and relying the ej2-angular-xxx to pick its dependencies.
I don't know if your issue is happening in Angular, but again, this same issue happened to me and was because of ambiguous versions and relied all the top libraries (ej2-angular-xxx) to pick their specific dependencies by themselves and rip them off from my package.json.