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

Backtrace:
/modules/wr/include/function.php (641)
/modules/wr/include/function.php (575)
/modules/wr/include/function.php (908)
/modules/wr/include/function.php (488)
/modules/wr/index.php (1541)