OCSP Stapling doesn't work for Thawte certificates, what's the problem?

Question

Digital certificates

OCSP Stapling does not work for Thawte certificates on Nginx, what could be the problem?
Configured Nginx to work with OCSP Stapling.

ssl_stapling on;
ssl_stapling_verify on;
ssl_trusted_certificate /ssl/ssl_trusted_certificate.crt;

The ssl_trusted_certificate.crt certificate includes the stitched root.crt and intermediate.crt.
The test query shows that OCSP Stapling is disabled anyway:

openssl s_client -connect xxx.xxx:443 -tls1 -tlsextdebug -status

Result:

OCSP response: no response sent

Who faced a similar problem, what could be the matter? Or at least know which way to go?