Hello,
Thank you for posting in Q&A forum.
This error indicates that the logged in user does not have permission to read the private key on the certificate generated during the provisioning and enrollment process. To resolve this issue, install the May 21, 2019 update.
If the problem still cannot be solved after installing the patch, here is a thread similar to yours. You can try the methods in it to see if it can solve the problem:
Best regards
Zunhui
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