Error message
Deprecated function : strtr(): Passing null to parameter #1 ($string) of type string is deprecated in y__strip_tags() (line 2035 of sites/all/modules/site/y/y.module ).
How to use Git to install a YAD7 / Drupal 7 module from its source git repository.
Drupal underwent a dramatic redesign when moving to Version 8. Overall, the emphasis went towards enterprise-level projects and an assumption that a website would have an army of systems people behind its initiation, development, and maintenance.
YAD7 is a community-sponsored answer to The Drupal Organization's announcement of End-of-Life for Drupal 7. Because Drupal is open-source, the community has the opportunity to decide whether to go along with the main-line branch (currently in version 8 and moving towards version 9), or whether to pursue a different course. Given that there are about a million Drupal 7 sites, and that the migration path to Drupal 8 involves a profound redesign of existing sites, the Drupal community needs a more compatible migration path forward.