Envato Market plugin - update NOT available

I have installed Envato Market plugin, created a token and plugin shows Updates Available for the theme Massive Dynamic.

When I select “update available” nothing happen, the button do not work. I’ve try everything, refresh the page, also tried the instal from Plugins, select theme - update theme and after a couples of minutes having “Briefly unavailable for scheduled maintenance. Check back in a minute.” I keep getting this error message: “An automated WordPress update has failed to complete – please attempt the update again now.” I’ve tried multiple times to “update again now,” but each time I keep seeing the same error message.

Does anyone know why it is failing and how I can fix it?