This is not English, it's telegraph-style wording in IT applications to save valuable space. Also, The system has failed to connect the call, because we have no access to the microphone.
– Yosef BaskinJun 23 '22 at 13:24
Welcome to EL&U. If you take a look at posts from the past dealing with headlinese, and telegraphese, you will see that this type of question comes up quite frequently, hence the VTC as duplicate.
– Cascabel_StandWithUkraine_Jun 23 '22 at 18:16