Unable to Send E-Newsletter

I'm trying to send a newsletter but but although it says "sending" there is no bar and it is not progressing. See screenshot

Originally when I started it said it was sent to 1 of 140 members. Each time I check, the number goes down and now it says it was sent to 1 or 134 members, but there is still no bar and it is stuck at 1.

If I go back it now says that it has been sent to 5 and when I click to Continue Send it now says it was sent to 1 of 133 members.

Support access is granted. Can you please get my newsletter to send to all my members.
Thank you.