The accusers withdrew their testimony, Swedish prosecutors were caught falsifying and destroying documents, and the case was withdrawn due to lack of evidence.
I'd say that you could have found all this out yourself with Google, but you didn't even need to. All this info has already been linked in these comments.
You know accusers in sexual assault allegations often withdraw their testimony due to the pressures of the case – especially in this case where the women were threatened, smeared and accused of being honeypots etc?
Most of the links in these comments aren't authoritative in anyway
> There were never any formal criminal charges, and the Swedish Prosecution Authority’s investigation into Assange was dropped in November 2019 due to a lack of evidence.
I'd say that you could have found all this out yourself with Google, but you didn't even need to. All this info has already been linked in these comments.