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Please choose the statement that applies to you.
Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /vhome/spyrlsch/htdocs/public/participant_create.php:27
Stack trace:
#0 {main}
thrown in /vhome/spyrlsch/htdocs/public/participant_create.php on line 27
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