Issue solved. If i assign an alias to my dashboard (for example: ‘main’), i can access with this new alias without any special character like ‘&’
Previous link not working as starting page:
http://x.x.x.x/emoncms/dashboard/view?id=1
New link working with alias as starting page
http://x.x.x.x/emoncms/dashboard/view/main
And works without any problem 