Virtual fields don’t work

I have a large project running in 2025, and when migrating to 2026, it does not work.

I took the initiative to create a new project, but there are also a number of errors without custom code.

Virtual fields don’t work.

Slow project generation and the generated project.

Among other situations.

By “virtual fields” did you mean Custom Fields? If yes, did you have similar problem as Custom fields - NonUniqueFieldNameException? If not, you may post the details of the error for discussion.