how long does it take for the Reports located in OneDrive to be updated on app.powerbi.com

[Cyrilbrd]

Considering a set of pbix files located on OneDrive and uploaded on app.powerbi.com.

So far the tiles load correctly and all pages are present.

I assumed that the 'refresh' button located in the submenu of the DATASETS would 'refresh' said data, but in fact such just 'crashed' the system, with the apparition of a small yellow triangle with an exclamation point giving the following message:

Oops, something went wrong.

An error occurred while processing the data in the dataset.

Processing ErrorThe credential stored in the cloud is missing.

Cluster URIWABI-SOUTH-EAST-ASIA-redirect.analysis.windows.net

Activity Id4c6e0507-dfdc-4acb-9852-15d31d2f5db2

Request Idbbd9ab12-49ce-4214-c629-d88411f224f9

Time2015-09-02 07:43:12Z

What one should do to ensure that app.powerbi.com reads data from OneDrive on a regular basis?

What would be such basis?

Is there a setiing for such?

Thanks for any feedback.