I updated my video card drivers and also did this - Repair Visual C++ Redistributables
Unfortunately nothing has changed I still get the failed to initialize dependency modules message on trying to launch the map. 
Unsure now if it is something server side where the maps are stored / hosted from or if it is something I can fix in the Unreal-FortniteEditor but would need some guidance to move forward on this as I am out of ideas.
Thank you for that link Stevie-Moon, where do I go next do I fill out a Support request?
I had gone into UEFN / Help / Report Issue and from there was taken to Creator Bug Report Form, I filled everything out except Island Code (unsure if I have an island code for my map or if I get given that after publishing, If I have one for a currently unpublished map I don’t know where to find that info at present.
I have not heard anything reference reporting the bug but understand these things will take time.
So anything else I can do or any info I should look at I am in limbo with this issue so would have to get some further help guidance.
Thanks in advance to anyone who can help.
On another post of the same issue it says this but this does not apply to my project so something else must be causing the problem.
Got that from another post found HERE
I can confirm my projects are stored on OneDrive but never had an issue previously the others launch fine and this one did for the last 6 - 8 weeks and only stopped working around 8th July.
Here is the latest info from Output Log
Sometimes I also get this - failed to create server session then when I try again it tries to launch but get the above (failed to initialize dependency module)
Map is almost finished just placing weapons & cover + tidying a few areas up, have no way of checking or publishing until I can launch the session.