Unable to publish plugin to plugin portal

Greetings, have trouble to publish plugin, can’t figure out the reason, as error message is absent (message located below), but with the same config previous upload was successfull, attaching part of stacktrace and json response

Caused by: java.lang.RuntimeException: Failed to post to server.
Server responded with:
Server side processing failed. Please email support with reference hash: d063f3

{
    "failed":true,
    "errorMessage":"Server side processing failed. Please email support with reference hash: 07eef4"
}

Hi George,

The URL you submitted for your plugin caught a little bug in our plugin validator. This issue should be fixed now; however, I think an empty value for the URL would be more welcome than what might be invalid.

You can retry anytime. Sorry for the trouble.

Cheers,
Eric