CJBlog menu item "Create an Article" works fine.

But, use the menu and go to Blog Categories or to Blog Category, then use the in page link "Create an Article", and that will not work. The link generates a strange URL  https://domain_name_dot_com/index.php/ur-blogs/blog-categories?view=form&a_id=0&layout=edit&return=aHR0cHM6Ly9idWlsZHRoZXdhbGxvcmZhbGwub3JnL2luZGV4LnBocC91ci1ibG9ncy9ibG9nLWNhdGVnb3JpZXM/dmlldz1jYXRlZ29yaWVzJmlkPTg=

 System Info:

CJBlog was latest download today
Joomla 3.9.2
Database Type     mysql
Database Version     5.5.5-10.2.13-MariaDB-log
Database Collation     latin1_swedish_ci
Database Connection Collation     utf8mb4_general_ci
PHP Version     7.2.10
Web Server     Apache
WebServer to PHP Interface     cgi-fcgi