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Changes between Initial Version and Version 1 of Ticket #59206, comment 5

initial	v1
1	1	The error appeared whenever there were no arguments passed to the [caption] shortcode. Which ended up $attr to be undefined variable.
2		So added a condition to check it and initialize it as an empty array if not defined.
	2	So added a condition to check it and initialize it as an empty array if not defined. Patch above.