Then, wait for sync, and reconfigure the widget to enable the widget display in the calendars selector. Calendar sync/storage error If your calendars are visibles, but not events (in the stock application), then your phone have a problem to sync those events.
It turns out that this is a feature of Android where widgets are blocked for apps that are installed to the SD card.
This was my problem since I had just moved all of my apps the SD card to save space.
To resolve this issue, the app had to be moved back to the memory of the phone using these steps: Repeat these steps for any other apps you are experiencing the same issue with. You will have to clear the Home screen data and start fresh.
These steps will reset your icons on the Home screen back to defaults.
It clear all your phone data, but keep all your calendar informations in Google server.
Then, you’ll have to wait for resync, and go to step 1. Permissions Some ROMs allow users to control permissions for each application.