cannot build android apk on Corona version 2017.3100

Hi -  hope you can help ?

just installed version 2017.3100

compiled an .apk but it will not install on the device.

it just says “app not installed”.

i’ve not changed any of settings from before that used to work before the update.

** just reinstalled 2017.3075 which was the version i was on previously, and that will no longer install ??  same issue - however, it worked this morning before the update?

​any help would be much appreciated. thanks

sorted it.

deleted some old versions of the app off my device and its installed. 

sorted it.

deleted some old versions of the app off my device and its installed.