Content Security Policy: The page’s settings blocked the loading of a resource: xyz

The warning "Content Security Policy: The page’s settings blocked the loading of a resource: xyz" occurs when the page's CSP configuration given by xyz prevents the resource from being loaded into the document's context.

Message

Firefox Content Security Policy: The page’s settings blocked the loading of a resource: xyz
Chrome Refused to apply inline style because it violates the following Content Security Policy Directive: "xyz". uvw.
Refused to execute inline script because it violates the following Content Security Policy directive: "xyz". uvw.
Refused to run the JavaScript URL because it violates the following Content Security Policy directive: "xyz". uvw.
Refused to execute inline event handler because it violates the following Content Security Policy directive: "xyz". uvw.
xyz
The name of the CSP directive that blocked the resource. This may be expressed as either just the name of the directive, or as the entire policy directive string.
uvw
Text that provides information that may help you resolve the problem, potentially including specific changes you might make to the CSP configuration.

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What went wrong?

This warning message means that due to the existence of a particular CSP directive, a resource wasn't loaded.

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See also