Module tab grayed out in email layout
We have started to work on templates that contain modules in version 2.0. I followed Marketo's base template for this and tweaked it. I approved the template and when I created an email, the modules were working fine. I was able to delete, move, and add them in the layout. I went back into the layout today and now the module tab is grayed out and I can no longer do anything with them in the layout. They now act like regular editable areas. Any idea why this is? Is this a bug? Thanks!