With Premium content I get the the message:
Failed to install module : invalid json response body at https://foundryvtt.com/_api/packages/get reason: Unexpected end of JSON input
I suspect that a time parameter does not not work, due to European time change, a few hours ago.
Hi,
I believe this error is likely because you are still using Foundry 0.8.6. There was a bug in 0.8.6 which did things in an invalid way and caused some issues to the Foundry servers and it stopped working a little while ago, which is why it fails to get your premium content.
You can read this article on How to update Foundry Virtual Tabletop on The Forge - Docs - The Forge
I have changed the defaullt version to 0.8.9 this worked, before I have only changed one world to 0.8.9 that was not working, thank you for your quick support.