I actually recently reported a bug for this and I believe our developers are working on it, although I cannot give you an ETA for a fix at this time: https://jira.atlassian.com/browse/CONF-29639
It seems Twitter have shut down their v1 API and this is impacting the Widget Connector, although unfortunately at this time we don't have a workaround because it needs to be fixed in the Widget Connector. However, I would strongly recommend that you watch/vote/comment on the ticket to stay updated with progress and to encourage our developers to prioritise a fix for this issue.
All the best,
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