well this is because i am using Lates uIpath studio version and packages. and those activities which i am using are not backward compatible with your version.If any update available in your package manager then updates all packages then try it otherwise you have to use latest version to see that .XAML ot follow below screenshot steps in your studio 
Regards…!!
Aksh
Anil_G
ashokkarale
Ajay_Mishra
Gautham_Pattabiraman
BHUSHAN_NAGAONKAR1
vrdabberu
ABHIMANYU_THITE1
lrtetala
samantha_shah
shyamala_shyamu