fix bug

src/views/projectManage/requirement/list/create.vue

@@ -372,7 +372,7 @@ export default {
             return
           }
           this.form.creator = localStorage.getItem('username')
-          this.form.rqmtProposer = this.form.rqmtProposer.length ? this.form.rqmtProposer.join() : null
+          this.form.rqmtProposer = this.form.rqmtProposer && this.form.rqmtProposer.length ? this.form.rqmtProposer.join() : null
           this.form.referredClientType = this.form.referredClientType ? this.form.referredClientType.join() : null
           if (this.title === '新建需求') {
             const res = await createRequirement(this.form)