Pirate-forms W3C

How can i find these codes in order to modify it due to w3c standards?

1 Error: Attribute name not allowed on element div at this point.
From line 612, column 6; to line 612, column 165

ap”>↩ <div id=”pirate-forms-captcha” name=”pirate-forms-captcha” class=”g-recaptcha pirate-forms-g-recaptcha” data-sitekey=”XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX”></div>

2 Error: Duplicate attribute class.
At line 613, column 199

t-button” class=”” type=”submi

3 Error: Attribute placeholder not allowed on element input at this point.
From line 615, column 6; to line 615, column 125

div>↩ <input id=”wordpress-nonce” name=”wordpress-nonce” class=”form-control” type=”hidden” value=”xxxxxx” placeholder=””></form

4 Error: Attribute placeholder is only allowed when the input type is email, number, password, search, tel, text, or url.
From line 615, column 6; to line 615, column 125

div>↩ <input id=”wordpress-nonce” name=”wordpress-nonce” class=”form-control” type=”hidden” value=”xxxx” placeholder=””></form

TY in advice!

https://ww.wp.xz.cn/plugins/pirate-forms/