'Postman returns "Error: passed a null parameter" when using Client Certificate

I requested certificate from my CA (on a MAC) then exported the private key as p12 file. In Postman preferences I configured Client Certificates by PFX file/passphrase: enter image description here

I know it's reading it since I get incorrect passphrase error if set a wrong one.

Once it's set, I get error shown below in Postman Console: "Error: passed a null parameter" and the request is not being sent to server -- any ideas?

enter image description here

postmanclient-certificatesmtls


Solution 1:[1]

I got it to work after exporting from KeyChain both the "private key" and "certificate" together to a p12 file.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Ben

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