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Error : TypeError: implode(): Argument #1 ($array) must be of type array, string given

Backtrace:
/modules/wr/include/function.php (591)
/modules/wr/include/function.php (525)
/modules/wr/include/function.php (858)
/modules/wr/include/function.php (438)
/modules/wr/index.php (1493)