Can't upload files in Safari 14

[pannnap13367140]

 About a week or two ago I've noticed that mi Stock page is not loading statistics and can't upload files. I'm in Safari 14 Mac OS X Mojave. I've tried Google Chrome and everything works fine.

Is anybody experiencing the same problem? Is there any solution?

Thanks!

[Abambo]

 Is there any solution?

Thanks!

By @pannnap13367140

Ditch Safari, go for Chrome!

Try Safari with a private tab. If that works, delete cookies and cache.

[pannnap13367140]

Thanks for the advice! I've tried to open it in a private window in Safari, but problema persists....