So, I solved it for me!
It works with the Samsung browser.
1. I am redirected from the mix to dropbox for authentication.
2. i enter the 2 factor code.
3. i give mix the permission.
4. i am redirected from dropbox to the callback page.
5. now it's important: in the samsung browser in the address bar appears a small mix symbol, I clicked on it and lo and behold, I am sent back to the mix app and have
access to the dropbox data.
Thanks to all for the effort
P.s. i am delete samsung browser now
It works with the Samsung browser.
1. I am redirected from the mix to dropbox for authentication.
2. i enter the 2 factor code.
3. i give mix the permission.
4. i am redirected from dropbox to the callback page.
5. now it's important: in the samsung browser in the address bar appears a small mix symbol, I clicked on it and lo and behold, I am sent back to the mix app and have
access to the dropbox data.
Thanks to all for the effort
P.s. i am delete samsung browser now
