Hi there! I encountered the same error. To resolve it, make sure your CSR (Certificate Signing Request) is converted to Base64. I initially missed this step, which led to the issue. Once I converted the CSR to Base64, the problem was solved.
Brother it was an issue about 7 days ago
i was getting the response during Generation PCSID after compliance step and the response was “The provided CSR is invalid.”
then i figured it out and do a major change and my change was
Replacing the Chilkat Library with openSSL and it works fine i got CCSID then Did Compliance of invoices then generated PCSID and my unit is onboard successfully.
But i am still on the point why the CSR generated by using the Chilkat library gives error of invalid csr during generating PCSID