Devtools error: could not read file as String

[tenninebt]

When I try to use the devtools with signals: ^6.2.0, I get the following error:

could not read file as String: devtools_extensions/signals_0.0.7/index.html

[rodydavis]

Working on a bit update to devtools.

I am going to match the new preactjs package for debugging signals:
https://github.com/preactjs/signals/tree/main/packages/debug