I got this issue too. I wrote email to axure team and they are working on a solution. But you can publish with their last version build 3872, you just need to download that version.
We are currently experiencing issues with publishing directly from Axure RP 10 RC build 10.0.0.3873, our engineering team is looking into this.
To publish, you can either uninstall this version and install the latest stable build (10.0.0.3872) using the links below. Once you have reinstalled this version, be sure to leave the checkbox for "Include beta channel builds" unchecked. Alternatively, you can publish directly via app.axure.cloud.