This is a problem I’ve been facing for years.
It is caused by the embedded browser for Xibo Windows (CefSharp).
Occasionally, content loads incorrectly for any reason, and this error pops up on the screen.
I created some mechanisms to deal with this automatically, such as maintenance scripts that restart the software when it identifies that there has been a software failure.
However, it is a “solution” that only disguises the problem, but does not solve it.
The only way I was able to permanently reduce the incidence of this error was by upgrading my Windows computers to at least 8GB RAM.
Another solution for Xibo to be able to use another embedded browser would be to encourage the correction of WebView2’s WPF controls in this GitHub topic. But I’ve already given up. It’s an age-old problem that it seems will never correct, which at the moment makes us “hostage” to the use of CefSharp as a browser embedded in Xibo for Windows.
This thread here in the community may give you some alternative solutions as well.