I cannot submit my VAT return through MTD

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I have signed up for MTD with HMRC and been accepted. I have reconciled my VAT return and clicked submit online.  I get the sign in icon appear in the top left hand corner but the HMRC sign in page does not come up and I cant get any further.

I have checked the company setting and preferences and all seems o.k.  Rang HMRC and they said it was a problem with the sage software not communicating with HMRC software.

Please help.

Thank you

Mary Blunt