Unit
Warning: Undefined array key "id" in /home/u564191134/domains/theycotes.com/public_html/test/includes/flash-deck.php on line 179
0 Introduction 1 cards ·
Warning: Undefined array key "topics" in /home/u564191134/domains/theycotes.com/public_html/test/includes/flash-deck.php on line 183

TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /home/u564191134/domains/theycotes.com/public_html/test/includes/flash-deck.php:183
Stack trace:
#0 /home/u564191134/domains/theycotes.com/public_html/test/flashcards/deck.php(89): fdx_render()
#1 {main}