When using Panelizer, the following runtime error is appearing: Deprecated function: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in PanelizerEntityDefault->get_default_panelizer_object() (line 2876 of panelizer/plugins/entity/PanelizerEntityDefault.class.php).
This happening on every page load of a panelized node on a Panopoly child distribution; not sure of exact steps.
Use an empty string instead of leaving the variable undefined.
Patch and test.
None.
None.
None.