Hello
thanks for taking care this ticket.
I would like to update the status so far.
After I noticed that I can post via WP-app on my phone, I assume this issue comes from Gutenberg editor.
Therefore I installed classic editor plugin, prioritized it and gave a try.
It works!
So I focused on solving this issue on Gutenberg.
First of all I wanted to check Gutenberg version and sought if I can only reinstall it.
Then I downloaded the Gutenberg plugin and activated it, gave it one more try.
Surprisedly this time the Gutenberg works perfectly as before.
I am not professional but I guess that if there is a Gutenberg editor plugin and a built-in, the WP will give the plugin priority.
I believe this problem is not solved thoroughly but I finally can post.
If my case could be helpful or someone can give better solutions, I am glad to provide more info.
add one more thing observed: I can post via WP app on my iPhone.
