Watch-Face Upload not possible - server error (since over 1 week)

Hi guys,

I developed my first watch-face and I was really excited to upload it to the store.
Though I prepared everything really good, I got a server error:

"Sorry, your message couldn’t be submitted because we’re having trouble communicating with our servers. Please try again later."

After trying again after a few hours, a day later and also 2 days later, I started to search the internet for solutions.
I also came across this forum where there were suggestions to change the network to a very fast one, try different browsers, delete cache, ....

After trying for over a week with multiple networks, devices, browsers, ... I have no clue what could be the problem.
I also wrote a mail to the dev-support but I do not get a response since almost a week.

Does anyone of you have a clue what could be the problem?

I would be very thankful for any hints!

Have a nice day, guys! :-)