cant post pics on my wall?

[Crash]

Ok, here's what I can do to help. Go through this list of instructions if it applies to you:
Mobile version:
1. Navigate to your wall on the Facebook App (Android or Apple).
2. Locate a small camera icon that says "photos" or anything indicating photos.
3. When it asks to take a photo, locate another photos or album icon indicating that you can upload a photo already taken.
4. Upload the photo and write a post, tag and edit the photo if you so wish to.
Desktop version:
1. Go to your wall or news feed.
2. Click on the "Photo" tab underneath the timeline (if you have a timeline) otherwise click on "photo" underneath the "Friends/photos" tab of your wall.
3. Select "Upload Photos/Video".
4. Upload a photo from the source directory (wherever it is located on your computer)

Check out this link if you have anymore issues regarding uploading photos/sharing photos:
https://www.facebook.com/help/118731871603814/

I hope this helps!
If you have any further inquiries, check the Facebook Help Center on the following link: https://www.facebook.com/help/