If you have updated to WordPress 5.0 you are going to notice a new Post/Page interface that will not be accessible to your screen reader and you wont be able to create Posts as you did in the past but all is not lost.
The new interface is called Gutenberg and it is garbage at present but you can go back to the old interface by installing and activating the plugin “classic editor”, just go to Plugins-Add and type in classic editor and install it, then activate.
For more information visit WordPress 5.0: How and When to Update
.