Same error on w10, odoo18 runs python 3.12 but my system an other, see :

in console i install phonenumbers : pip3 install phonenumbers

install ok by python 3.8 ! ; search location exe du 3.8 in PATH  then  copied  the folder phonenumbers from C:\"PATH"\python\Lib\site-packages to C:\Program Files\Odoo\python\Lib\site-packages

it works

Hello

I have been trying to resolve the same issue for the past hour, with no luck.

I keep getting the same error again and again

Opération invalide

Impossible d'installer le module "account_peppol" à cause d'une dépendance externe non trouvée : External dependency phonenumbers not installed: No package metadata was found for phonenumbers 

I initially tried the 18.0 version. Then 17, then 16 (same issue).

I installed Python 3.12, and copied  the files from C:\Program Files\python\Lib\site-packages to C:\Program Files\Odoo\python\Lib\site-packages. Then i tried 3.13

Can anyone help ? I keep reading about commands but i have no idea where to put them? (Btw I have no IT background)

Thanks a lot

This error occurs because you are missing the phonenumbers library. Open the terminal, activate the virtual environment (venv), and enter the following command: pip3 install phonenumbers

I have version 3.12.8. Anyway for future reference I fixed the problem by copying the files from 

C:\Program Files (x86)\python\Lib\site-packages

to 

C:\Program Files\Odoo\python\Lib\site-packages

Obviously the python I installed is not the one Odoo is using. I copied the folders phonenumbers and phonenumbers-8.13.53.dist-info.

After that, no restart, it worked.