Update site settings eg. title causes fatal error in plugin

[aplauche]

After 6.3 update I am seeing a fatal error when I try to save settings in the general settings menu like set title and tagline. It is being triggered in a plugin file, but I tested and the plugin does not have this error in 6.2, so wanted to flag even if code change needs to be made in plugin.

The plugin itself registers a settings page and option. The fatal error seems like the plugin is attempting to save it's option field even though we are not on the plugin's own options page. This triggers a fatal error. The plugin obviously should be updated to handle the null case, but not sure why it is receiving an update from the general settings page.

[aplauche]

Screenshot of stack trace

[aplauche]

Marking invalid for now. Seems to be unique to plugin after testing with several other similar plugin/options page setups.