Why does post scheduler only work on my mobile app and not desktop?

Adobe Express Content Scheduler is failing to publish ANY social media post from my Windows desktop. The Publish Now button becomes disabled/gray, the publishing process hangs for approximately a minute, then returns me to the editor without publishing or scheduling the post. There is no error message and it doesn’t show up on my scheduling calendar.

This occurs with every new post I create, not just one particular design. It happens across different social channels. The same accounts can publish successfully from the Adobe Express mobile app on my phone.

I have already tested multiple browsers, Incognito mode, disabled all browser extensions, cleared Adobe Express site data/cache, enabled Chrome/Windows notifications, verified the social account connections, and tested the Adobe Express Windows PWA. The behavior is identical.

Please escalate this to the Adobe Express Content Scheduler/engineering team. I believe this is a server-side or account-specific Scheduler publishing failure.