Here is another photo showing more info on the issue:

There’s details about a similar issue here 

You may need to check the status of the smart meter itself

There's also a guide here 

Hi @Jonatan, 

Our forum volunteer has already given some advice here. Hope it was helpful.

Please let us know if you’ve managed to get this sorted.

This little utility might help: with your permission, it will access your meter and give a brief technical report about it, its comms hub and the IHD. You’ll need your MPAN  - the 13-digit number you’ll find on a recent bill. Tick the tiny box confirming that it’s your supply, then click on Check meter: homebrew.n3rgy.com.

It’s common to see warnings about expired security certification - you can safely ignore these. Any other warnings or errors will probably indicate what’s wrong.

28-2 is an easy one - you probably just need to get the IHD authorized into the Electric Meter again. OVO Support can process that if you let them know.