This is my understanding. This error clearly shows that the signature of the cost engineer is the act of signing on behalf of the contractor. This is a very prominent problem. The key lies in whether the bidding documents and bid evaluation methods clearly stipulate this, such as the requirement that signatures cannot be signed on behalf of others. If so, there is a risk of nullifying the bid.

If there is no clear explanation, it depends on the specific practice of the bid evaluation Committee. In fact, in practice, many people also call for not to abolish the bid easily, depending on whether the deviation is serious or not, and some small mistakes can be ignored.

Since the tender has been closed, if you make further changes beyond your ability, so be it. What else can you do? To tell the truth, the more people who work, the more problems there are, and those who don't work have no problems at all. This is an embarrassing question. Learn a lesson and just pay attention next time.