Couldn't validate python script error message on OS X

Checklist

• This is a bug report.
• Streamlink is working correctly on my system without using the Twitch GUI.
• I tried solving my issue by reading the project’s wiki first.
• I used the search function to find already opened/closed issues or pull requests.

Description

I started getting an error message saying Couldn't validate python script when launching twitch streams after upgrading from 1.2.1 to 1.3.0. Downgrading to 1.2.1 makes the problem go away.

Reproduction steps

1. Open the app
2. Select a stream and try to watch it

Environment details (operating system, etc.)

Streamlink Twitch GUI 1.3.0, OS X, Python 3.6.1, streamlink installed from pip.

Comments, logs, screenshots, etc.

The log file contains entries like the following

[2017-05-24T02:40:57.084Z][error][StreamingService]
Error: Couldn't validate python script
    at n.a (chrome-extension://kjlcknihpadniagphehmpojkkdigigjp/main.js:7:192748)

[jhanssen]

Aha, thanks for the detailed info. I created a python symlink in /usr/local/opt/python3/bin and streams are indeed launching now. I can live with this as a workaround until this gets fixed.

[bran]

@jhanssen yep can confirm this works! Thanks for clarifying.