2026r1 convert to modern UI error"No container found for view ConnectedVendors in the Screen Schema for screen."

I try to migrate my old customization project to modern UI in 2026r1.

At first, I wanted to convert the entire project directly, but it failed with the following error:No container found for view ConnectedVendors in the Screen Schema for screen. Probably for the HTML element 'QP-GRID' with the Id 'gridConnectedVendors' provided View Name is not declared in the TypeScript ViewModel.

Then I tried to convert each page separately. Some of them succeeded and some failed. And I found that the above error comes from the “Vendors” page.

Then a similar “Customers” page also has a similar error:

No container found for view CustomerBillingCycles in the Screen Schema for screen. Probably for the HTML element 'QP-GRID' with the Id 'gridBillingCycles' provided View Name is not declared in the TypeScript ViewModel.

Judging from the names, these errors are all related to native fields, not the custom fields I added. How should this be solved?