Upload file when custom domain is configured

Hi!

When I'm using my custom domain, my repository download page cannot upload a new file... I always get a message like this:

<Error>
<Code>MalformedPOSTRequest</Code>
<Message>
The body of your POST request is not well-formed multipart/form-data.
</Message>
<RequestId>FDBA2F41A53D9C5D</RequestId>
<HostId>
GYEowj98CakbZietYsbExEZ06ncLUFGovlZ0nEI7erMiE72QAzi0SVGyHOsHOV9U
</HostId>
</Error>Tks!