Assembly Freezing / Not Responding

Hi,

As soon as I try to change anything in the parent assembly, such as the depth or the name, the program stops responding.

All of the child items appear to be working correctly; it is only the parent assembly that gets stuck and becomes unresponsive.

This is as far as I can get before everything becomes blocked. It is extremely frustrating, as this issue has now been happening for the past three days and nights and is preventing me from progressing with my work.

Could you please look into this as soon as possible?