Wordpress Fix (E-commerce)

My Wordpress e-commerce website is experiencing some technical issues and I'm looking for an experienced developer to help me fix them. Unfortunately I don't have any documentation, so previous experience within the Wordpress platform is essential. I do have screenshots of the errors which may be of some help. I just need this issue fixed and nothing else, so basic requirements only. If you think you could help me, I'd love to hear from you.