Am getting this message more and more frequently when I try and change the amount I want to charge the battery to.
There was an error changing your settings: Inverter Timeout. Please try again
It happens on the web site and the mobile app.
Is your inverter dongle on wifi
Is connection reliable
Is dongle solid blue showing all connected OK
https://kb.givenergy.cloud/article.php?id=1&oid=1
Also if using the web portal, is your mobile app currently open and in home mode?
I sometimes find the two clash with each other, e.g. try to write the change just as the app is reading.
Likewise do you have any automation setup - e.g. GivTCP/ Home Assistant frequently polling the system?
TX200 , I have found that to be the case as well.
If changing settings through the App, set to Away mode first, change the settings and Save, wait for confirmation, then switch back to Home.