Microsoft today pushed Windows MOBILE/PC preview 14946 to Fast Insider members, but there will be an error in updating this version for users installing additional language packs. Now, Microsoft has solved the problem.
In today's Win10 Mobile preview 14946 Known issues, Microsoft said: "If your phone has other voice packs installed, this version of the upgrade will fail, display 0x80188319 error." That's why we have a language pack vote this week. According to your reply, we decided to push this version. This issue will be fixed in the next release. Please note that removing the voice pack does not solve the problem and you will still update failed. We recommend that you migrate to slow insider until this problem is repaired. ”
Now that Microsoft has crossed the issue in the update log, it says it's done. Users who install additional voice packs may try again to update them.