From time to time Google releases updates to Chrome or reviews extensions after which they may require users to accept permissions again.
If you are a current user of the ExtendSync Chrome extension you will see a message similar to the one below.
To re-enable the extension click the ! and accept the permissions.
Following is a description of the permission required as of Feb 1, 2019.
Read and change your data on celigo-secure-resources-s3-amazonaws.com
Our app is hosted on AWS therefore our app is required to ask for permission for this domain. No user data is transferred over this URL.