error Invalid regular expression

[wodin]

Hi

Try setting EXPO_DEBUG to true before starting expo to see if you get more information about where the problem happens.

Something like this:

C:\Projects\testapp>echo %EXPO_DEBUG%
%EXPO_DEBUG%

C:\Projects\testapp>set EXPO_DEBUG=true

C:\Projects\testapp>echo %EXPO_DEBUG%
true

C:\Projects\testapp>expo start

Also, do you by any chance have something mentioning __fixtures__ or heapCature etc. in app.json, package.json or other config files in your project?

The bad regular expression looks like it has Windows path separators (backslashes) in it instead of slashes. It’s possible that running expo start from within bash from WSL will fix this.

EDIT:
Your error message looks suspiciously like this post:

Error: EPERM: operation not permitted, lstat ...

I ejected to ExpoKit recently and followed the documentation, however, whenever I tried to run the app on any device or simulator the following error was thrown: Error: EPERM: operation not permitted, lstat … I scoured these forums and google in search for an aswer but none were sufficient. I finally figured out that metro watches the android directory created by ExpoKit and this conflicts when Android Studio is building or cleaning, or anything else that manipulates the files in the android …