Tom Tom MyDrive web does not work on the pc

"You are trying to use MyDrive on a browser that is not fully supported.
For the best experience, use the latest version of Firefox, Safari or Chrome.
We apologize for the inconvenience. "
But my browsers (Firefox and Chrome) are updated to the latest version !!
Answers
Superusers
@Cyborg1963
Firefox, Chrome & Microsoft Edge all working fine here...
Is your PC a Tablet ??? are the version of Firefox, Safari or Chrome
The cut down version of the browsers that are used sometimes on tablets....
ATB YFM
PC only, no tablet. It only works with Microsoft Edge.
Very strange because until a few days ago it also worked with Firefox.