http error❆l888:6O6:I8O8 wordpress 5 internal server & upload error

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https://readthedocs.org/projects/wordpress-directory-error-l8886o6i8o8-database-connection/ 
https://readthedocs.org/projects/too-l8886o6i8o8-wordpress-database-mysql-connection-error/

https://readthedocs.org/projects/http-errorl8886o6i8o8-wordpress-5-internal-server-upload-e/
https://readthedocs.org/projects/http-errorl8886o6i8o8-wordpress-5-internal-server-upload-e/
https://readthedocs.org/projects/http-errorl8886o6i8o8-wordpress-5-internal-server-upload-e/
https://readthedocs.org/projects/http-errorl8886o6i8o8-wordpress-5-internal-server-upload-e/