At first, thank you for answer :)
there is content of /etc/apache2/mods-enabled/, I checked all links is fine
$ ls -m /etc/apache2/mods-enabled/
actions.conf, actions.load, alias.conf, alias.load, auth_basic.load, authn_file.load, authz_default.load, authz_groupfile.load,
authz_host.load...