Can anyone help? Problem with 'hive.blog'

For 3 days now, no posting for me on hive; the only way I can communicate on hive is by comments. I cannot make any posts and I do not understand why.

The less important problem:

I use 8 tags, as I always have, but now I get a message that 'only 8 tags are allowed' and I have to reduce them to 7 for the warning message to go away. (I can live with this problem, the next one is what has stumped me).

As soon as the "submit" page opens, I have this message:

Must end with a letter or number

....and the Post button stays gray.

I have attempted to make a post, double-checking the title is ok, the tags are ok, and then, the article/message itself.

I cannot see that I am doing anything wrong, and it means I now cannot post at all on any of my hive accounts.

Here is a visual example of what I see:

Anybody know what is wrong?