If you’re having trouble sending messages in the secure messaging app Signal, it may be due to technical difficulties the company says are affecting the app on Friday. Signal allows for secure and encrypted video, voice, and text communication, but users were greeted this morning with messages that failed to send. Signal confirmed the issue on its official Twitter account with the promise that it would “restore service as quickly as possible.” Signal is experiencing technical difficulties. We are working hard to restore service as quickly as possible. — Signal (@signalapp) January 15, 2021 In the last week, Signal reported a surge of new users to its app following a recommendation from Tesla CEO Elon Musk and a new WhatsApp privacy policy that may have driven users away from the Facebook-o...