Same issue. What is going on with Xcode?
igork
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After a couple a days I found the issue. It was that I base64 encoded CSR file. Don't need to do it, this file is already contains BASE64 data in between-----BEGIN CERTIFICATE REQUEST----- ... BASE64 ENCODED DATA ... -----END CERTIFICATE REQUEST-----So the correct body is{ "data":{ "attributes":{ "certificateType":"IOS_DISTRIBUTION", "csrContent":"'$(cat private.csr)'" }, "type":"certificates" } }