This is very strange issue only started to happen today.
I have not changed any settings or the like and suddenly when I try to open PowerApps it does not open in Internet Explorer or Chrome.
Usually I open it through my SharePoint site and click the PowerApps icon. However, trying to open by going to https://web.powerapps.com/home also does not work.
In Chrome I get this error:

In IE I get blank page:

It does open in Firefox, which is very strange. However, I can not open web studio through Firefox.
Is anyone else experiancing this issue or is it just me? Tried to restart computer, same issue.