odoo-server

I have two instances of Odoo in a server in the cloud. If I make the following steps I get "Internal Server Error": I make login in the first instance ( http://111.222.33.44:3333 ) I close the session I load the address of the second instance in the same browser ( http://111.222.33.44:4444 ) If I want to work in the second instance (in another port), I need to remove the browser cookies first to acces to the other Odoo instance. If do this everything works fine. If I load them in differents browsers (Firefox and Chromium) at the same time, they work well as well. It's not a NginX issue because

When I try to install odoo-server , I got the following error: error: Setup script exited with error: command 'x86_64-linux-gnu-gcc' failed with exit status 1 Could anyone help me to solve this issue? Fred Python.h is nothing but a header file. It is used by gcc to build applications. You need to install a package called python-dev. This package includes header files, a static library and development tools for building Python modules, extending the Python interpreter or embedding Python in applications. enter: $ sudo apt-get install python-dev or # apt-get install python-dev see http://www