Hello, when I print any report gives me this error code 11, i added the error message in below

Can you help me?

Thanks a lot.

Wkhtmltopdf failed (error code: -11). Memory limit too low or maximum file number of subprocess reached. Message : b' cannot resolve sk_free\nQSslSocket: cannot resolve sk_num\nQSslSocket: cannot resolve sk_pop_free\nQSslSocket: cannot resolve sk_value\nQSslSocket: cannot resolve SSL_library_init\nQSslSocket: cannot resolve SSL_load_error_strings\nQSslSocket: cannot resolve SSLv3_client_method\nQSslSocket: cannot resolve SSLv23_client_method\nQSslSocket: cannot resolve SSLv3_server_method\nQSslSocket: cannot resolve SSLv23_server_method\nQSslSocket: cannot resolve X509_STORE_CTX_get_chain\nQSslSocket: cannot resolve OPENSSL_add_all_algorithms_noconf\nQSslSocket: cannot resolve OPENSSL_add_all_algorithms_conf\nQSslSocket: cannot resolve SSLeay\nQSslSocket: cannot call unresolved function CRYPTO_num_locks\nQSslSocket: cannot call unresolved function CRYPTO_set_id_callback\nQSslSocket: cannot call unresolved function CRYPTO_set_locking_callback\nQSslSocket: cannot call unresolved function SSL_library_init\nQSslSocket: cannot call unresolved function SSLv23_client_method\nQSslSocket: cannot call unresolved function sk_num\n'