PageSpeed pagespeed.conf problem

Below is my current pagespeed.conf config.

Something in there breaks the WP Rocket "Regenerate Critical CSS" tool.

When I run the tool it generates this error.

An error prevents the generator from retrieving its contents.

---

After lots of testing disabling plugins etc I have worked out this only happened when I enable pagespeed.conf in my Nginx config file.

What in the below config is wrong or would break the WP Rocket Cache plugin?

Is there anything obvious?

Thank you.

Code:

pagespeed on;

#######################################################
# Purge nginx pagespeed cache
# https://developers.google.com/speed/pagespeed/module/system#flush_cache
#######################################################
pagespeed EnableCachePurge on;
pagespeed PurgeMethod PURGE;

#######################################################
# File cache settings
######################################
# needs to exist and be writable by nginx

pagespeed FileCacheSizeKb          102400;
pagespeed FileCacheCleanIntervalMs 3600000;
pagespeed FileCacheInodeLimit      500000;

#######################################################
# By default, ngx_pagespeed adds an X-PageSpeed header with a value of the version of
# ngx_pagespeed being used. This directive lets you specify the value to use instead:
# pagespeed XHeaderValue "ngx_pagespeed";

#######################################################
# let's speed up PageSpeed by storing it in the super duper fast memcached
# Ensure Memcached server installed http://centminmod.com/memcached.html
# default install for centmin mod is on port 11211, so localhost:11211 is correct
# uncomment - remove hash # in front of below 2 lines to enable
# timeout set at 100 milliseconds
pagespeed MemcachedThreads 1;
pagespeed MemcachedServers "localhost:11211";
pagespeed MemcachedTimeoutUs 100000;

#######################################################
## 1.11.33.0 beta save-data
######################################
# https://developers.google.com/speed/pagespeed/module/filter-image-optimize#image-quality

# https://developers.google.com/speed/pagespeed/module/reference-image-optimize#JpegQualityForSaveData
pagespeed JpegQualityForSaveData 50;

# https://developers.google.com/speed/pagespeed/module/reference-image-optimize#WebpQualityForSaveData
pagespeed WebpQualityForSaveData 50;

# https://developers.google.com/speed/pagespeed/module/filter-image-optimize#resize_rendered_image_dimensions
pagespeed EnableFilters resize_rendered_image_dimensions;

# https://developers.google.com/speed/pagespeed/module/filter-image-optimize#WebpRecompressionQuality
pagespeed WebpRecompressionQuality 75;

#######################################################
## 1.7.30.1 beta defaults
######################################
pagespeed PreserveUrlRelativity on;
pagespeed MaxCombinedCssBytes -1;
pagespeed ImageResolutionLimitBytes 16777216;
# pagespeed EnableFilters inline_google_font_css;

#######################################################
## 1.6.29.3 beta defaults
######################################
pagespeed AvoidRenamingIntrospectiveJavascript on;
pagespeed ImageInlineMaxBytes 3072;
pagespeed CssImageInlineMaxBytes 0;
pagespeed MaxInlinedPreviewImagesIndex -1;
pagespeed MinImageSizeLowResolutionBytes 3072;

#######################################################
## ngx_pagespeed filters settings below ##
######################################

  # show half the users an optimized site, half the regular site
  # change UA-XXXXXXXXXX-1 to your GA unique id
  # uncomment - remove hash # in front of below 5 lines to enable
#  pagespeed RunExperiment on;
#  pagespeed AnalyticsID UA-XXXXXXXXXX-1;
#  pagespeed ExperimentVariable 1;
#  pagespeed ExperimentSpec "id=1;percent=50;level=CoreFilters;enabled=collapse_whitespace,remove_comments;";
#  pagespeed ExperimentSpec "id=2;percent=50";
 
  # Filter settings
  # filters outlined at http://ngxpagespeed.com/ngx_pagespeed_example/
  pagespeed RewriteLevel CoreFilters;
  pagespeed EnableFilters collapse_whitespace,remove_comments;

  # https://www.modpagespeed.com/doc/config_filters#FinderPropertiesCacheExpirationTimeMs
#  pagespeed FinderPropertiesCacheExpirationTimeMs 7200000; 

  # https://www.modpagespeed.com/doc/config_filters#forbidding
   pagespeed ForbidAllDisabledFilters true;

  # https://developers.google.com/speed/pagespeed/module/filter-attribute-elide
#  pagespeed EnableFilters elide_attributes;

  # https://developers.google.com/speed/pagespeed/module/filter-dedup-inlined-images
#  pagespeed EnableFilters dedup_inlined_images;

  # make_google_analytics_async
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-make-google-analytics-async
#  pagespeed EnableFilters make_google_analytics_async;

  # make_show_ads_async
  # https://developers.google.com/speed/pagespeed/module/filter-make-show-ads-async
#  pagespeed EnableFilters make_show_ads_async;

  # responsive_images, responsive_images_zoom
  # https://developers.google.com/speed/pagespeed/module/filter-image-responsive
#  pagespeed EnableFilters responsive_images;
#  pagespeed EnableFilters responsive_images_zoom;

  # convert_to_webp_animated
  # https://developers.google.com/speed/pagespeed/module/filter-image-optimize#convert_to_webp_animated
#  pagespeed EnableFilters convert_to_webp_animated;

  # inline_google_font_css
  # https://developers.google.com/speed/pagespeed/module/filter-css-inline-google-fonts
  pagespeed EnableFilters inline_google_font_css;

  # require FetchHttps if using https site
#   pagespeed FetchHttps enable;

  # https://www.modpagespeed.com/doc/https_support
    pagespeed SslCertDirectory /etc/pki/tls/certs;
    pagespeed SslCertFile /etc/pki/tls/cert.pem;

  # inline_css
  # https://developers.google.com/speed/pagespeed/module/filter-css-inline
#   pagespeed EnableFilters inline_css;
#   pagespeed CssInlineMaxBytes 2048;

  # prioritize_critical_css
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-prioritize-critical-css
#   pagespeed EnableFilters prioritize_critical_css;

  # move_css_to_head
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-css-to-head
  pagespeed EnableFilters move_css_to_head;

  # move_css_above_scripts
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-css-above-scripts
#  pagespeed EnableFilters move_css_above_scripts;

  # combine_css
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-css-combine
#  pagespeed EnableFilters combine_css;

   # Uncomment this if you want to prevent mod_pagespeed from combining files
   # (e.g. CSS files) across paths
   #
#  pagespeed CombineAcrossPaths off;

  # combine_javascript
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-js-combine
#  pagespeed EnableFilters combine_javascript;
#  pagespeed MaxCombinedJsBytes 122900;

  # extend_cache
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-cache-extend
#  pagespeed EnableFilters extend_cache;

  # rewrite_css
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-css-rewrite
#  pagespeed EnableFilters rewrite_css;

  # rewrite_javascript
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-js-minify
#  pagespeed EnableFilters rewrite_javascript;

  # inline_preview_images
  # https://developers.google.com/speed/pagespeed/module/filter-inline-preview-images
  pagespeed EnableFilters inline_preview_images;

  # lazyload_images
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-lazyload-images
  pagespeed EnableFilters lazyload_images;

  # rewrite_images
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-image-optimize
   pagespeed EnableFilters rewrite_images;
#   pagespeed DisableFilters rewrite_images;
#   pagespeed DisableFilters recompress_images;
#   pagespeed DisableFilters convert_png_to_jpeg;
#   pagespeed DisableFilters extend_cache_images;
#  pagespeed EnableFilters convert_png_to_jpeg;
#  pagespeed EnableFilters convert_jpeg_to_webp;
#  pagespeed EnableFilters convert_to_webp_lossless;

  # sprite_images
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-image-sprite
# pagespeed EnableFilters rewrite_css,sprite_images;

  # insert_dns_prefetch
  # https://developers.google.com/speed/docs/mod_pagespeed/filter-insert-dns-prefetch
  pagespeed EnableFilters insert_dns_prefetch;

  # InPlaceResourceOptimization
  # https://developers.google.com/speed/pagespeed/module/system#ipro
  # Enabled by default as of 1.9.32.1
  pagespeed InPlaceResourceOptimization off;

#######################################################

 

I still get the same error if that is commented out or specifically disabled.

I am not bothered about the error in WordPress and WP Rocket if the pagespeed configuration is better and works.