Warning: array_merge(): Expected parameter 2 to be an array, bool given

[Vishkujo]

I'm getting this error on a certain page "Warning: array_merge(): Expected parameter 2 to be an array, bool given in /var/www/html/w/extensions/PortableInfobox/includes/services/Parser/Nodes/NodeMedia.php on line 166"

I'm not sure what's causing it. Here is the page: https://jojowiki.com/Caesar_Anthonio_Zeppeli

It also doesn't show the second picture in the infobox.

Edit: I fixed it by converting the image's mode to RGB Color (was on Indexed before) and reuploading the file.