I can not set last.fm linkage

[yerupaja0]

I can not set last.fm linkage

Always thank you for your help.
I am in trouble because I can not cooperate with last.fm and I would like to have you tell me if you know it.
I use spotify in the following environment,
· IPad Pro 9.7inch
· IOS 10.2

In the setting of Spotyfy → Social → last.fm, even if you try to enable Scrobble and enter user ID and PW, the condition that can not be input continues, so (The input cursor is canceled and the keyboard is closed It is nice to tell people who know how to avoid it.