Using the code at https://github.com/DanTup/devtools/tree/bad-structured-errors, running the sidebar results in this error that appears to be missing information:

Specifically, it says "The relevant error-causing widget was:" but has nothing after it.
Using the code at https://github.com/DanTup/devtools/tree/bad-structured-errors, running the sidebar results in this error that appears to be missing information:
Specifically, it says "The relevant error-causing widget was:" but has nothing after it.