Hi i had a client make me an offer but excepted one day late. The client was fine and said he would just make me another offer so I could reply in a valid time.
However when he tried to make me another offer he kept getting errors. Please advise how he should solve this.
Have you checked that you did not, in fact, accept the offer after all, and it has indeed expired?
If you have not accepted the offer, and it has expired, get the client to go directly to your profile and click on "Hire now" like so:
It does look like the offer has expired. Please, have your client follow Petra's instructions and he should be able to hire you directly from your profile even if he accidentally declined or archived your proposal.