Spoke to live chat and this slotboss is restricted to UK and Swedish players only.
Bit daft but that's only my opinion.
I contacted live chat and got a different answer. They told me players from Ireland are accepted. I also looked at their terms and they have an excluded country list. If they were restricted to players from Sweden and UK surely they would state that on their site. See list of excluded countries below:
YOU ARE LOCATED IN ANY OF THE FOLLOWING JURISDICTIONS AT THE TIME OF REGISTRATION OR THE PLAYING OF ANY OF THE GAMES:
Afghanistan, Albania, Algeria, American Samoa, Andorra, Angola, Anguilla, Antarctica, Antigua and Barbuda, Armenia, Aruba, Austria, Australia, Azerbaijan, Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belize, Benin, Bermuda, Bhutan, Bolivia (Plurinational State of), Bosnia and Herzegovina, Botswana, Bouvet Island, Brazil, British Indian Ocean Territory, Brunei Darussalam, Bulgaria, Burkina, Faso, Burundi, Cambodia, Cameroon, Cape Verde, Cayman Islands, Central African Republic, Chad, Chile, China, Christmas Island, Cocos (Keeling) Islands, Colombia, Comoros, Congo (the Democratic Republic of the), Cook Islands, Costa Rica, Cote d'Ivoire, Croatia, Cuba, Czech Republic, Korea (Democratic People's Republic of), Djibouti, Dominica, Dominican Republic, Timor-Leste, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Ethiopia, Falkland Islands (Malvinas), Faroe Islands, Fiji, France, French Guiana, French Polynesia, French Southern Territories, Gabon, Gambia, Georgia, Germany, Ghana, Gibraltar, Greenland, Grenada, Guadeloupe, Guam, Guatemala, Guinea, Guinea-Bissau, Guyana, Haiti, Heard Island and McDonald Islands, Honduras, Hong Kong, Hungry, India, Indonesia, Iran (Islamic Republic of), Iraq, Israel, Jamaica, Japan, Jordan, Kazakhstan, Kenya, Kiribati, Korea (Republic of), Kuwait, Kyrgyzstan, Lao People's Democratic Republic, Latvia, Lebanon, Lesotho, Liberia, Libyan Arab Jamahiriya, Lithuania, Macao, Macedonia (the former Yugoslav Republic of), Madagascar, Malawi, Malaysia, Maldives, Mali, Marshall Islands, Martinique, Mauritania, Mauritius, Mayotte, Mexico, Micronesia (Federated States of), Moldova (Republic of), Monaco, Mongolia, Montenegro, Montserrat, Morocco, Mozambique, Myanmar, Namibia, Nauru, Nepal, Netherlands, Netherlands Antilles, New Caledonia, Nicaragua, Niger, Nigeria, Niue, Norfolk Island, Northern Mariana Islands, Norway, New Zealand, Oman, Pakistan, Palau, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Pitcairn, Poland , Puerto Rico, Qatar, Korea (Republic of), Reunion, Romania, Russia, Rwanda, Saint Helena, Ascension and Tristan da Cunha, Saint Pierre and Miquelon, Saint Vincent and the Grenadines, Samoa, Saudi Arabia, Senegal, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, South Georgia and the South Sandwich Islands, Sri Lanka, Sudan, Suriname, Svalbard and Jan Mayen, Svalbard and Jan Mayen, Swaziland, Switzerland, Syrian Arab Republic, Taiwan, Province of China, Tajikistan, Tanzania (United Republic of), Thailand, Togo, Tokelau, Tonga, Trinidad and Tobago, Tunisia, Turkey, Turkmenistan, Turks and Caicos Islands, Tuvalu, Uganda, Ukraine, United Arab Emirates, United States, Uruguay, Uzbekistan, Vanuatu, Holy See (Vatican City State), Venezuela (Bolivarian Republic of), Vietnam, Virgin Islands, British, Virgin Islands(U.S.), Wallis and Futuna, Western Sahara, Yemen, Zambia.