页面 formhash 的内容改了。这个代码要改一下

原来第一步换成这个获取formhash
GM_xmlhttpRequest({ url:"https://bbs.tampermonkey.net.cn/dsu_paulsign-sign.html", method: 'GET', onload:function (xhr) { var res = xhr.responseText var formhash = getStr(res,'<input type="hidden" name="formhash" value="','">') resolve(formhash); }, })

GM_xmlhttpRequest({
        url:"https://bbs.tampermonkey.net.cn/dsu_paulsign-sign.html",
        method: 'GET',
        onload:function (xhr) {
            var res = xhr.responseText
            var formhash = getStr(res,'<input type="hidden" name="formhash" value="','">')
            resolve(formhash);
        },
    })

GM_xmlhttpRequest({
        url:"https://bbs.tampermonkey.net.cn/dsu_paulsign-sign.html",
        method: 'GET',
        onload:function (xhr) {
            var res = xhr.responseText
            var formhash = getStr(res,'<input type="hidden" name="formhash" value="','">')
            resolve(formhash);
        },
    })

可以用了，ggnb！