Help add-onn shows no source

[Android Question]

but when I press ok no links show yet they are in configuration. ????

 

[Hadron]

Can you give more information, such as what app you are trying to use? Remember that we know nothing that you don't include in your post, so better to spell things out than assume we'll guess.

(I've searched the Play Store in case it's something called "add-onn" but didn't find an obvious candidate)