How to reload "webserver/php-fpm" on Snappy package?

Hi there,

Would anyone please let me know how to reload webserver/php-fpm on the snappy package?

I have used Notes app and after the upgrade I started to experience the issue reported here:

The question has been answered with that it should work again by reloading webserver/php-fpm, and yet I don’t know how to do that.

It would be very appreciated how to fix the error. Thanks in advance.