have不是定语，you have with…这一堆才是定语。
主句talk about problems.
怎么样的problems:
problems you have with …
实际是：you have problems with …把problems提出来了。
两句话融合而成。
词性不能变，不要用中文的思维来分析

"Talk about problems you have with..." Z最好把完整句子贴出来。先做句子分析如下：
1. 主句为省略主语You 的祈使句，talk此处为不及物动词，作为主句谓语动词，about为介词后接宾语形成介宾短语 about problems；
2.从句为定语从句，从句先行词为problems，完整从句应该是”that/which you have with…“ 修饰先行词problems；而 从句的主语是you，从句谓语动词为have（非形容词），而problems（由that/which代替）则在从句中做宾语。you have problems （that/which）with……，合并主句则变成 You（省略）Tell me about that