I spend like 4 hours fighting scriptcase with I grid.
Problem: I grid named emails_grid that I had, when I generated the new code with the latest version stopped pagination and searching (quick search).
I tried everything and the problem is with the name of the grid.
Solution: I just changed and started working.
Conclusion: Love and hate scriptcase.
Don’t know why, just giving my experience for anyone that happens to be with the same bug.