PLEASE DO NOT CONTACT THE CUSTOMER DIRECTLY.
I have a woocommerce website which was made about 4 years ago.
This website is customized a lot. so I have not updated any plugins or Theme.
I have been using it fine until last Thursday.
After credit card information is submitted to the checkout, I get this error.
https://secure.authorize.net/gateway/transact.dll
Error — not AuthorizeNet. Check your MD5 Setting.
I talked to the Authorized.net and they said they do not support md5 setting since last Thursday.
I already tried other authorized.net plugins and updated ones, but all of them had comparability errors with the WP version and PHP version.
I updated WP and php versions and still did not worked. so I restored it to the original condition.
I think only way to fix this problem is fixing this plugin Authorize.net DPM Gateway 1.5.2 version.
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