My edit post and add new post has been a blank page.
I could not even publish any of the previous post draft.

After a google search, the solutions is to install back the classic editor.
I guess the Guttenberg editor maybe not compatible with the updates.

Weird though, how can it pass and installed the update.

anyway, the solution for this issue is :

Go to the “Plugins” > Add new >

Install the “Classic Editor” and activate.