Definitely a false claim, even according to Radio Free Europe:

Olena Shevchenko, an activist for the lesbian, gay, bisexual, and transgender (LGBT) community, wrote on Facebook that police did “nothing” to prevent the group of right-wing Azov and Pravy Sektor battalion members from disturbing the October 18 event in the city of Chernivtsi.

…

She also said two men – one Ukrainian and one German – suffered light injuries after being attacked by Azov members.