Hi Hanericks,

Adding or importing custom or third-party modules to your Odoo instance can be achieved using various methods. One common approach is outlined in the following guide: How to Install a Custom Module in Odoo 16. This guide provides step-by-step instructions on how to install a custom module in Odoo version 16. Following these instructions, you can seamlessly integrate additional functionalities into your Odoo instance to meet your specific business needs.

Hope it helps

Hi,
Modules can be imported from the user interface using the Import Module menu only if the modules contains data files, ie, only xml files, if the module contains py and new model definition from python this method will fail.  In the pop up where the module is going to import is alerting the user about it.

For example, suppose if you need to add this module to your odoo instance :  https://apps.odoo.com/apps/modules/17.0/om_account_accountant/

You cannot upload this module from the import module menu, if you do so, you will receive some errors saying model is missing etc.

In this time, the right procedure is:

* Get the module
* Extract the module and add it your custom addons path if exists or create new custom addons path
* restart the odoo service
* Update app list
* Search for the module and install

The apps coming under Industries section in the store is a good examples of module that can be imported by the way you specified:  https://apps.odoo.com/apps/modules/saas-17.1/software_reseller/

Thanks