I did suffer from the same problem from past 2 days, but I ultimately found the fix:
1)
Change the entry in httpd.conf:
#onlineoffline tag – don’t remove
Require local
to
#onlineoffline tag – don’t remove
Require all granted
Source: https://www.youtube.com/watch?v=XbBGYm14xY4
2) Change the entry in httpd-vhosts.conf:
<Directory “c:/wamp64/www/”>
Options +Indexes +Includes +FollowSymLinks +MultiViews
AllowOverride All
Require local
</Directory>
to
<Directory “c:/wamp64/www/”>
Options +Indexes +Includes +FollowSymLinks +MultiViews
AllowOverride All
Require all granted
</Directory>