When you remove a module manually or re import a database, some times you have a message like "The following module is missing from the file system...". this is due to deleted modules.

In this example, we will use a field to get tags list, the number of tags dynamic.

Simple taxonomy autocomplete field.

Example:
$form['tagtest'] = [
  '#type' => 'entity_autocomplete',
  '#target_type' => 'taxonomy_term',
  '#title' => 'Taxonomy Term',
];

To Show more than 100 terms in taxonomy administration (overview) page, You must set the terms_per_page_admin of taxonomy.settings.

Completely reset

Delete the .git directory locally.

Recreate the git repository:

$ cd (project-directory)
$ git init
$ (add some files)
$ git add .
$ git commit -m 'Initial commit'