\IPS\Lang : 654

if ( \in_array( $k, array_keys( $this->words ) ) )

Maybe it is better to use \array_key_exists?

if ( \array_key_exists( $k, $this->words ) )

 

I get this error when using CheckboxSet with multiple = true and member groups as options:

This looks like the same report as this topic: 

 

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Posted October 19, 2019