Accvess from iPad 3 running IOS9.3.5

No login to EMONPi from iPad running IOS9.3.5

A general query. I can access both EMONPi and a Raspberry pi connected to TX3 from Iphone 11 (IOS14) and Windows 10 PC, but using older iPad on IOS 9.3.5 I am unable to login .
Both now running emonpiRelease: emonSD-17Oct19

I was previously running emonsd- sept16 and was ok.

any thoughts