Why can I not install app?

[marioDOTmpeg]

Even with Unknown Sources checked all I can do is cancel. Install cannot be tapped or clicked or chosen or whatever, it just don't work.

 

[marioDOTmpeg]

 

[Zaher Rishmawi]

Maybe remove airplane mode?

 

[marioDOTmpeg]

airplane mode off = no difference.. After I power off then on I can't install still but if I pull the battery out I can install then I can't again..