Thanks Robwin, Steve K. and all.
I finally got rid of Rapport and Edge now works again. Shame on IBM!
At least 1 year ago I had the installation of Rapport recommended by my bank. I installed it and it messed things up. I removed it and I reported it to my bank and also told them they shouldn't make recommendations without first checking them out and that they should inform their source (IBM) not to propose such products. Now it got installed again on my computer - I don't know how - and it wasted many hours of my time. Maybe I should sue IBM for my loss of time and frustration!