Error in verify signature: Cannot initialize

[VingoYang]

I am trying to verify the signature, but I got the error: Cannot initialize.
Here is my code:

public static function verifySignature($hash, $signature, $address) {
try {
$sign = [
"r" => substr($signature, 0, 64),
"s" => substr($signature, 64, 64),
];
$reCid = ord(hex2bin(substr($signature, 128, 2)));
if ($reCid != ($reCid & 1)) {
return false;
}
$ec = new EC('secp256k1');
$publicKey = $ec->recoverPubKey($hash, $sign, $reCid);
return $address == self::pubKeyToAddress($publicKey);
}catch (\Exception $exception) {
throw new HashException($exception->getCode(),$exception->getMessage());
}
}
verifySignature("c230e229e1e7edd299b4c142ac105a84df7c114ef1d6c538ee9e8461f70b2ad3",""W6AdiMNBTRb/a9oa43CFnL+UjpdhJ4QuxfnVQuTY8EB0RQQ2pvWEeIF9c5oMrokVrCmtBiXe4vW3Fvu+mIZ2bwA=","0x38737be4bb9bdB44Fa4367935E087Dad925CE172");

I traced the error and found it threw out when executed to $ec->recoverPubKey($hash, $sign, $reCid);