Secondly, in the process of bid evaluation, it was found that experts missed the sign or made mistakes in scoring calculation. Don't be nervous, let alone sign for them. As upstairs said, it is wrong to ignore him (experts may have different opinions, but they must explain the reasons and put them on record. You don't have such conditions at all. The correct way is to ask a few experts to come back for a replacement (this is the most formal way). However, this is generally not the case. Just contact the expert who missed the signature and ask him to make it up (most experts will agree, don't be too nervous, be modest when contacting).
Finally, let's say a few more words. Bidders must be careful. This kind of mistake is really low-level If you had been a little more careful, you wouldn't have appeared.