PBEM error: Cant find the follow up save..

[Ikiv5]

Hello,
I have an issue with an PBEM, after running a few turns without issues i had an error running the turn. It stated it couldnt find any follow up save in the PBEM, i checked and there was all including the save the Nationalist player sent me. So I thought deleting the pbem saves and leaving just the one send would solve the issue, but no. So I was wondering if there is a way to continue the campaign. I have the save game sent to me for processing and the original sent game from the previous turn sent to the nationalist. Thanks in advance.