I'm experiencing the same issue! I was using cloud Retool and switched to self-hosted and now the sidebar frame is HUGE, and I'm unable to adjust the width. It's making my app unusable.
I also cannot figure out how to activate the sidebar frame for another app I want to build. I've clearly done it before, but I can't figure out how to do it again. I've read through this thread, but still couldn't figure it out. When I click on the "+" in the Frames section of the component tree, I only see options for Drawer and Modal.
