Starting June, 1st, Telerik platform will change Tap Core's endpoint by cutting out "v1" from the url.
This would break the Sitefinity Everlive Connector and therefore we will address the change upfront with the 9.0 release coming in March. We'll also ensure the old endpoint-url is working b/n March and June. We recommend that all Sitefinity customers who are utilizing the Everlive Connector to upgrade to Sitefinity version 9.0 prior to June 1st.
For customers, who cannot upgrade to Sitefinity version 9.0 prior to June 1st., we will provide (upon a request) relevant hotfixes for the following official versions 8.2, 8.1 and 8.0
Please contact Sitefinity suppport in case you have further questions.