How to disable pagespeed in the Bitnami stack?

change ModPagespeed on to ModPagespeed off in lampstack-x.x.x/apache2/conf/pagespeed.conf then restart your server

How to disable PageSpeed?

To disable PageSpeed, follow these steps:

Comment out the following lines in the installdir/apache2/conf/httpd.conf file:

 Include conf/pagespeed.conf
 Include conf/pagespeed_libraries.conf

ref: https://docs.bitnami.com/installer/components/pagespeed/