A PHE spokeswoman said: "We think it was due to high traffic".
Meghan picks up where her husband leaves off, assuring viewers "there's a new way to help turn things around" when facing mental health struggles.
The film is narrated by the Duke and Duchess of Cambridge and the Duke and Duchess of Sussex, who in May launched a text messaging service for people experiencing a mental health crisis through their royal foundation.
The government-backed campaign, which has been launched in partnership with the NHS, aims to help people create their own mental health action plan, recommending self-care actions people can take to deal with stress and improve sleep as well as to boost their mood and to feel more in control of their lives.
The powerful advert featured a range of famous people whose lives have been impacted by poor mental health, including Gillian Anderson, Will Young, Glenn Close, and many more.
Next Kate explains how the campaign can get people started "with a free online plan created to help you deal with stress, boost your mood, improve your sleep, and feel more in control".
A recent survey conducted by Public Health England (PHE) showed more than 83 per cent of people in the United Kingdom had felt anxious, stressed or low, or had had trouble sleeping in the last 12 months.
"Every Mind Matters will make its debut in a co-branded roadblock broadcast moment, supported by Channel 4's continuity announcements and innovative digital marketing activity. Every Mind Matters will show you simple ways to look after your mental health".
Public health officials in North Somerset are supporting the scheme which enables people to take simple steps to look after their mental health and support others.
He added: "It draws together the importance of treating our mental health on an equal basis to our physical health, and treating it both as an asset that each individual needs to invest in, supported by the NHS and by the Government, as opposed to just something that just needs to be fixed when it goes wrong".
For those without internet access, paper materials will be placed in places such as libraries, while Global Positioning System will be encouraged to direct patients towards the new resource.
Insights from last year's pilot in the West and East Midlands showed attitudes to mental health have shifted significantly, with people increasingly agreeing it's important to look after your mental health.
Public Health England (PHE) are today launching the first ever national NHS mental health campaign, called Every Mind Matters.
Health secretary Matt Hancock said Every Mind Matters is an "accessible tool to help manage our wellbeing at the click of the button".
We hope that this campaign will help increase public awareness of how we can all stay as mentally well as possible.