[Who Is the Artist?]

Hi Everyone,

 

I need help identifying the artist that did the sketch on a blank variant version of Spider Gwen.  Photo attached.  The signature looks like it might start with "M" or "N".

Any help would be appreciated! 

[Cannot post item to Atomic Avenue]

Whenever I try to post comics for sale to Atomic Avenue recently, the upload screen comes up, I click on the "Post" button and nothing happens.