The operator was found to have offered online games of chance to consumers in the Netherlands via its Sons of Slots brand.
During an investigation that ran from March until July, players were able to deposit funds and play games via the Sons-of-slots.com website, despite LCS not having a licence to operate the site in the Netherlands.
The KSA carried out checks on two occasions, first on 8 March and again on 12 July, with the regulator’s supervisor able to deposit and play online games both times.
As per laws that came into effect on 1 October last year, operators must be approved and hold the relevant licence to legally offer igaming in the country.
“The KSA has established that LCS Limited offers games of chance to Dutch consumers via at least one website,” the KSA said. “LCS Limited is not licensed to do so.
“As a result, no supervision is possible, which means that there is no control over, among other things, the fairness of the game and whether sufficient attention is paid to addiction prevention.”
Should LCS fail to comply with the order, the KSA said the operator could be issued with a penalty of €55,000 (£47,883/$55,445) per week, up to a maximum penalty of €165,000.
In addition to Sons of Slots, LCS also operates the SvenPlay Casino, Lapilanders Casino, Wallacebet Casino and Nucelonbet Casino brands.