I want another keyboard for my phone but no one works

[AC Question]

I have an Android phone, and i download another keyboard from play store but they don't work i tried other keyboards but none worked except the default one, how can i change my keyboard whenever i try another keyboard it says

 

[belodion]

It says what? Have you gone to Settings, Language & Input, and selected the newly-installed keyboard as the default one? https://forums.androidcentral.com/showthread.php?t=409154