GivEnergy Monitor for Android

Ok sorted.
The IP address on the router had a /24 at the end. Although it worked on this address at first the IP address on the giv app never showed it.
I put in the IP without /24 & all is well.
Many thanks
From a man with very little knowledge

Installed the full version yesterday, running ok.
Woke this morning & app not reading anything.
Tried re installing but still nothing.
What can i do?