What happens to the sale of property if the transaction couldn't happen due to formalities?

Dear,

I signed a FORM F with an Addendum expiring on 5 September.

At first me not knowing the process, I did not know that I needed to clear pending charges to sell my property.

I thought I will come to an arrangement with the buyer, and he agreed to that with compensation that we manage between me and the agency.

Then I went to the UAE for 3 weeks but nothing happened when I came back to France. They requested me to come back to sign the original contract because the bank could not accept the signed copy.

My question is, since the original contract is rejected and we have no original but pdf signed copy, is it a valid contract? Or it's not official unless signed on the paper original? Can I remove myself from the sale?

Also, if the contract is valid then and the expiry date reaches, what is happening?

Can I remove myself from the sale knowing for a fact that the NOC is pending and the contract could not be registered in the land department?

Thank you