It's not working again for me now on April 24, 2018. Same problem, Power BI Publish button is greyed out in the desktop app. Duplicated on two different systems with two of our accounts.
One test was done by downloading normally the latest desktop version from the power bi site. The test on the other machine was done by installing via the Windows 10 store app and allowing it to receive updates. Same result both systems.
No problem logging into either the desktop app or the online service, it's just that the Publish button is disabled in the desktop app.
PBI Desktop Version: 2.57.5068.721 64-bit (April 2018)
Windows 10 Version: 10.0.16299.402
Wth? I'm missing something obvious?
Is the Publish button greyed out for all pbix files or just specific ones? The Publish button is greyed out for blank reports. There is another Publish button in File > Publish > Publish to Power BI, is that one greyed out as well?
can any one answer this the publish button button is grayed out , in file -> publish also grayed out, not for the all the files only a specific PBiX file.