Android Install button inactive, cancel works Unable to tap on the INSTALL button for an app (that I created). Cancel button works fine. 

I have looked into other answers and they all seem to be talking about screen dimming / blue light filter apps - I am not using any screen dimming or blue-light filter app/tool, or have any such settings on (that I am aware of).

My phone is an Honor 6X. Its a phonegap/ cordova app that I created for my personal use. Have been using it for months, and have installed updated versions many times with no issue. Few days ago, while using the app - it got stuck (it was writing a lot of data into an SQL database) when it sorta hung up for a long time. So I closed the app - and after that it stopped working. It just won't start again. (I guess the SQL file got corrupted because I forcefully closed it when it was still writing data)..

I uninstalled it, and when I tried to reinstall again - the INSTALL button won't work - seems to be inactive.

I then changed the app ID (reverse domain id), app versions etc - and tried to install it as a new app - but that didn't work either.

Finally, I downloaded another third party app - (which I had successfully installed on my phone before) - and same issue - unable to tap the install button. So it looks like I am unable to install any kind of third-party app, not just that app. Can somebody help?
Anurag's suggestion worked for me. From the install screen lock your phone with your power button then unlocked and voila there's the install button