My roku account sign up not in usa , there is not search capabilities in home screen. I used roku open every channel no problem for long time until last week. I opened any developed channel by direct publisher channel tool . It become only search icon and info icon . I think it should be bug on only direct publisher . I opened developed channel by brigthscript (such as youtube netflix) no problem .
Have a look at Possible Resolution for strange DP channel errors for a potential fix to your problem.