1. Restart your browser (close and open it again).
2. If restarting the browser did not help, delete the extension from your browser by clicking on it with the right mouse button and selecting "Delete".
3. Install the extension again. Here is your installation link: Post.Postila.ru.
If these steps do not help, contact us. If possible attach a screenshot of the console of browser extension. It's very easy to do with our instruction: shot-konsoli-brauzernogo-rasshireniya-v-google-chrome/.
Customer support service by UserEcho