Judge Dabney L. Friedrich ruled this week that the Special Counsel's indictment of a Russian troll farm "does not link the defendants to the Russian government," and "alleges only private conduct by private actors." 

Following the February, 2018 indictment of three Russian firms and 13 Russian nationals, Mueller's office was caught off guard when some of the Russians actually showed up in US court to defend themselves.

I don't think anyone (including Mueller) anticipated that any of the defendants would appear in court to defend against the charges. Rather, the Mueller prosecutors seem to have obtained the indictment to serve a public relations purpose, laying out the case for interference as understood by the government and lending a veneer of respectability to the Mueller Switch Project. -Powerline Blog