Originally Posted by Mtracer

I agree the problem is with your browser not Strava. I've not heard of this type of issue with Strava. So, I suspect all the main browsers work with Strava without issue. I use Firefox. So, I guess if you're using some uncommon browser that could be the thing.

Aside from clearing the browser cache for Strava, you may also have changed some setting set that messes with Strava. Perhaps a security thing. Maybe even something in your virus protection. You could try temporarily disabling that just to see if it works.

Another thing is Strava can be set to work with all sorts of 3rd party things. Perhaps you're using something that is messing with loading the Strava pages. If so, try disabling those.