The following error is displayed when creating a SAN CSR using OpenSSL in NetScaler:
Problems making Certificate Request

When OpenSSL is used to generate the CSR then the country code greater than 2 characters in openssl.conf file is not allowed. To resolve this issue change the country code to 2 characters.

Please see the following Country Codes below that are required when creating a certificate signing request. 

• US United States of America
• CA Canada
• AX Åland Islands
• AD Andorra
• AE United Arab Emirates
• AF Afghanistan
• AG Antigua and Barbuda
• AI Anguilla
• AL Albania
• AM Armenia
• AN Netherlands Antilles
• AO Angola
• AQ Antarctica
• AR Argentina
• AS American Samoa
• AT Austria
• AU Australia
• AW Aruba
• AZ Azerbaijan
• BA Bosnia and Herzegovina
• BB Barbados
• BD Bangladesh
• BE Belgium
• BF Burkina Faso
• BG Bulgaria
• BH Bahrain
• BI Burundi
• BJ Benin
• BM Bermuda
• BN Brunei Darussalam
• BO Bolivia
• BR Brazil
• BS Bahamas
• BT Bhutan
• BV Bouvet Island
• BW Botswana
• BZ Belize
• CA Canada
• CC Cocos (Keeling) Islands
• CF Central African Republic
• CH Switzerland
• CI Cote D'Ivoire (Ivory Coast)
• CK Cook Islands
• CL Chile
• CM Cameroon
• CN China
• CO Colombia
• CR Costa Rica
• CS Czechoslovakia (former)
• CV Cape Verde
• CX Christmas Island
• CY Cyprus
• CZ Czech Republic
• DE Germany
• DJ Djibouti
• DK Denmark
• DM Dominica
• DO Dominican Republic
• DZ Algeria
• EC Ecuador
• EE Estonia
• EG Egypt
• EH Western Sahara
• ER Eritrea
• ES Spain
• ET Ethiopia
• FI Finland
• FJ Fiji
• FK Falkland Islands (Malvinas)
• FM Micronesia
• FO Faroe Islands
• FR France
• FX France, Metropolitan
• GA Gabon
• GB Great Britain (UK)
• GD Grenada
• GE Georgia
• GF French Guiana
• GG Guernsey
• GH Ghana
• GI Gibraltar
• GL Greenland

• GM Gambia
• GN Guinea
• GP Guadeloupe
• GQ Equatorial Guinea
• GR Greece
• GS S. Georgia and S. Sandwich Isls.
• GT Guatemala
• GU Guam
• GW Guinea-Bissau
• GY Guyana
• HK Hong Kong
• HM Heard and McDonald Islands
• HN Honduras
• HR Croatia (Hrvatska)
• HT Haiti
• HU Hungary
• ID Indonesia
• IE Ireland
• IL Israel
• IM Isle of Man
• IN India
• IO British Indian Ocean Territory
• IS Iceland
• IT Italy
• JE Jersey
• JM Jamaica
• JO Jordan
• JP Japan
• KE Kenya
• KG Kyrgyzstan
• KH Cambodia
• KI Kiribati
• KM Comoros
• KN Saint Kitts and Nevis
• KR Korea (South)
• KW Kuwait
• KY Cayman Islands
• KZ Kazakhstan
• LA Laos
• LC Saint Lucia
• LI Liechtenstein
• LK Sri Lanka
• LS Lesotho
• LT Lithuania
• LU Luxembourg
• LV Latvia
• LY Libya
• MA Morocco
• MC Monaco
• MD Moldova
• ME Montenegro
• MG Madagascar
• MH Marshall Islands
• MK Macedonia
• ML Mali
• MM Myanmar
• MN Mongolia
• MO Macau
• MP Northern Mariana Islands
• MQ Martinique
• MR Mauritania
• MS Montserrat
• MT Malta
• MU Mauritius
• MV Maldives
• MW Malawi
• MX Mexico
• MY Malaysia
• MZ Mozambique
• NA Namibia
• NC New Caledonia
• NE Niger
• NF Norfolk Island
• NG Nigeria
• NI Nicaragua
• NL Netherlands
• NO Norway
• NP Nepal
• NR Nauru
• NT Neutral Zone
• NU Niue

• NZ New Zealand (Aotearoa)
• OM Oman
• PA Panama
• PE Peru
• PF French Polynesia
• PG Papua New Guinea
• PH Philippines
• PK Pakistan
• PL Poland
• PM St. Pierre and Miquelon
• PN Pitcairn
• PR Puerto Rico
• PS Palestinian Territory
• PT Portugal
• PW Palau
• PY Paraguay
• QA Qatar
• RE Reunion
• RO Romania
• RS Serbia
• RU Russian Federation
• RW Rwanda
• SA Saudi Arabia
• SB Solomon Islands
• SC Seychelles
• SE Sweden
• SG Singapore
• SH St. Helena
• SI Slovenia
• SJ Svalbard and Jan Mayen Islands
• SK Slovak Republic
• SL Sierra Leone
• SM San Marino
• SN Senegal
• SR Suriname
• ST Sao Tome and Principe
• SU USSR (former)
• SV El Salvador
• SZ Swaziland
• TC Turks and Caicos Islands
• TD Chad
• TF French Southern Territories
• TG Togo
• TH Thailand
• TJ Tajikistan
• TK Tokelau
• TM Turkmenistan
• TN Tunisia
• TO Tonga
• TP East Timor
• TR Turkey
• TT Trinidad and Tobago
• TV Tuvalu
• TW Taiwan
• TZ Tanzania
• UA Ukraine
• UG Uganda
• UM US Minor Outlying Islands
• US United States
• UY Uruguay
• UZ Uzbekistan
• VA Vatican City State (Holy See)
• VC Saint Vincent and the Grenadines
• VE Venezuela
• VG Virgin Islands (British)
• VI Virgin Islands (U.S.)
• VN Viet Nam
• VU Vanuatu
• WF Wallis and Futuna Islands
• WS Samoa
• YE Yemen
• YT Mayotte
• ZA South Africa
• ZM Zambia
• COM US Commercial
• EDU US Educational
• GOV US Government
• INT International
• MIL US Military
• NET Network
• ORG Non-Profit Organization
• ARPA Old style Arpanet

Problem Cause

Country code should be less than 2 characters in openssl.conf file.