Doom 2016 Playstation 4 Mission 7 error message

[rampage7]

I am playing Doom 2016 on Playstation 4, using a disc.  I am in Mission 7 and I have completed the mission through the “Inflight Agility” Rune Challenge.  I begin the next exercise and when I am unsuccessful I immediately get Error Message CD-34878 “An error has occurred in the following application”.  The same thing happens after repeated attempts when I return to the check point and try again.  I went through a diagnostic exercise with a Playstation support person in which I first put the console into Safe Mode and the agent performed an operation and restarted the console.  This did not solve the problem.  I have never had this problem at any other point in the game.  I have never disconnected the power cord while the console is on, so I do not think the disc is damaged.  Have I done something wrong?  Has anyone else had the same problem at any point in the game and if you have, do you have a solution for me?

[Eurisko]

Have you tried un-installing and re-installing the game? I know that sounds like a ball ache because DOOM is a big file but it could be worth a try. BTW deleting the game wont delete your save game files.

 

[rampage7]

Thank you.  I need to know, before uninstalling and reinstalling the game, whether I need to subscribe to Playstation Plus, so that I can save my progress in the game to date by putting that "saved" data in the Playstation Plus data "cloud".  Let me know what I need to do.

[Eurisko]

No , your saved game file will remain on the hard drive. No need for PS Plus.