Man pages matching name x509_store_ctx_get_error in section 3ssl:

X509_STORE_CTX_get_error.3ssl.en	debian 10 / libssl-doc
X509_STORE_CTX_get_error.3ssl.en	debian 11 / libssl-doc
X509_STORE_CTX_get_error.3ssl.en	debian 12 / libssl-doc