Unveiling the Mystery: Content Security Policy Directive Errors

Encountering the enigmatic error "Refused to load the script..." when deploying Android apps? This issue stems from the Content Security Policy (CSP) directives, which restrict the loading of resources from untrusted sources. However, resolving this challenge can be straightforward.

In Android versions 5.0.0 and above, the default CSP directive for scripts is 'self' 'unsafe-eval' 'unsafe-inline'. This means that scripts can only be loaded from the same origin (self) or with unsafe execution (unsafe-eval). If you need to load scripts from remote sources, you'll need to modify the CSP directive.

As suggested in the provided answer, adding a specific directive for script-src to your CSP meta tag will resolve the issue. To do this, modify the meta tag in your index.html file to include the following:

<meta http-equiv="Content-Security-Policy" content="default-src 'self' data: gap: https://ssl.gstatic.com 'unsafe-eval'; style-src 'self' 'unsafe-inline'; media-src *; script-src 'self' http://onlineerp.solution.quebec 'unsafe-inline' 'unsafe-eval';">

Remember to replace "http://onlineerp.solution.quebec" with the URL of the remote script you need to load.

With this modification, your app will be able to load remote scripts without encountering CSP errors on Android devices running Lollipop and above.