How to give the access rights to access "localhost / lm" since I have the error 403 "forbidden you do not have ....."
It is probably an error in your server configuration.
We need more information about your lizmap installation if you want some helps : * Ubuntu version * Server used : apache or nginx * Lizmap web client version * QGIS Server version
If you use apache, your vhost configuration is not well done. I invite you to check Apache Error 403 to fix your issue.
Please use the lizmap mailing list https://lists.osgeo.org/mailman/listinfo/lizmap or the github repository .