NPE in Page Editor when trying accessing async mod variable error message

[twschiller]

Describe the bug

NPE in variable popover when accessing async state error

To Reproduce

1. Add the run async mod variable brick
2. Run the mod
3. In another brick try accessing the error message, e.g., by typing {{ @mod.foo.error. . When you type the . after error

Actual behavior

Shows NPE error. In previous iterations, IIRC is showed an "Edit in the Workshop" error

Expected behavior

Page Editor doesn't crash

Screenshots/Loom

About to type a .

Desktop (please complete the following information):

• Extension Version: 1.8.11