can it be flashed over mm v3 or do i need to upgrade to N 1st?

After flashing ROM it goes to blue screen saying phone didn't start right.any ideas?

Yeah on nougat qc5 in trying to downgrade to qa4 and try

That didn't work.any ideas on what I can do?

Download link says

404 not found
Can't find it!

If you are seeing this error page then the file in question has been deleted from the site and servers. Please contact the developer/uploader for a new link to the file.

Can someone please direct me to a link to upgrade from MM to N and also root via odin... please and thank you.

I downloaded amd flashed this the other night and ended up in a boot loop because I didn't realize I needed to be on N before flashing.

I'm in the same boat. I could use a little hand holding on going from your MM v3 to N v1 please.
I'm just not 100% certain on what the proper steps are.
I've found the stock N s7e fw from XDA - (I hope external links are ok here) https://www.theandroidsoul.com/download-...-edge-firmware/
Do I just need the BL file from that zip and odin both the BL and your Nv1 rom?

looks like the download link is down.