We are really sorry to inform the users of Awesync that due to the recent changes to Tasks API made by Google we have to temporarily suspend support of tasks in Awesync.
Despite the lack of information and absence of means to communicate with Google development team, we are trying to find the way of fixing and restoring tasks functionality. Meanwhile, please disable tasks synchroinization in Awesync settings - after doing this you won't receive error messages and will be able to perform synchronization of other IBM Notes data.
As soon as we restore tasks synchronization, we'll let you know about it by posting a note on AweSync website, Facebook and Twitter. We are sorry for the inconvenience and hope for your understanding.
Update (25.03.14) We're glad to let you know that a fix for tasks functionality is ready - please download Awesync 4.25 here.