Error: The OPC UA PubSub configuration is not valid
The OPC UA PubSub configuration is saved inside a project in xml format and then compiled to a binary file which is then part of the writable project image.
The error has been reported during compilation because the XML configuration data is corrupted. If the PubSub configuration editor is open and detects a corrupt configuration, the configuration is newly initalized, i.e. replaced by an empty editor form.