The Content-Security-Policy directive ‘default-src’ contains the keyword ‘none’ alongside with other source expressions

when i submit pxpay windcave credentials, in console below error occurs. Why?

The Content-Security-Policy directive ‘default-src’ contains the keyword ‘none’ alongside with other source expressions. The keyword ‘none’ must be the only source expression in the directive value, otherwise it is ignored.

i have tried to change the header default-src: self but not works for me.

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