Users were unable to get on the website afar it was overloaded by a denial of service attack, RIA Novosti reported.
The voting will elect officials leaders to a 45-seat coordinating committee formed by groups that have been protesting for 10 months for fair representation in free elections. The committee will be comprised of activists, liberals, leftists and nationalists.
More than 165,000 registered to vote electronically.
The elections committee said more details about the voting would be announced on Twitter.