Can't Publish Portfolio

[lyz25]

I am trying to publish a portfolio, but every time I upload my png's, the "go to preview" button is greyed out, so I can't go forward with publishing it. Help? 

[AndreaG]

Hi Elizabeth,

Could you please double-check that you're including all required fields?

[lyz25]

I am 100% sure I've filled in all of the required fields. I've asked the chatbot for help and have combed the other posts about this, none of which include any solutions.