Blogging with "solo" wordpress.com and tumblr.com blogs

I'm writing here because I searched in this forum and
I tried everything but I could not solve my problem. My problem is that I can not post "alone" in my blogs on wordpress.com and tumblr.com. I tried this

and also

and also

The same on tumblr.com. I can not understand why I can not do this? What am I doing wrong?

The error is "without form" or "without motor matches". I will be really grateful if you can help me with this.

I do not want to use serengines and I want this to make it core gsa-ser

I have rankerx and it is very easy to use these blogs with that. But I want to use the creator of articles to be because I can create original content with English above average with this.