Thanks for keeping the service and reading my post.
I faced a memory size limit for a certificate.
I contacted a CS of the HTTPS server.
A CS wrote the certificate size is too large and you should remove certificate policy or extended key usage.
We cannot increase memory for a certificate because of the hardware spec.
In fact, I can install a certificate issued by LE on January (because of no embeded SCTs).
What do you think about this.
Certificate details is following:
Key : RSA 2048 bits (the server don’t support ECC key)
SAN : 1 domain (32 letters, Of course, CN is the same)
OCSP must staple : no
※ The server bought on April this year. (It is not pre-owned.)