What is the problem with CERTIFY Certificate Manager?

Question

System administration

The program has been issuing SSL certificates for free and without problems for several months now,
BUT yesterday I needed to distribute 22 certificates (the whole procedure was successful), but it was planned to distribute much more of them and I encountered such a problem (which is fundamentally unknown and incomprehensible to me) look at the picture
in In general, I could not continue the work. all subsequent attempts were with the same outcome.
Bright minds, tell me how to be)

Answer 1

This program is unfamiliar to me, under Windows I only issue certificates upon a ready request, I do CSR generation and PKCS # 12 folding on Linux.