Pretty paths do not work in combination with contextual filters.

When the view has an alias, I get a 404, it seems that the route for the alias does not exist.

I'm not sure how to fix it, but for now, I've duplicated the path using the alias path.

I've update the latest patch fixing a small bug with the path lenght.

@facine
your patch isn't applying cleanly to the head of the 8.x-1.x branch

Not sure what your code is supposed to be patching, there's no recent changes.

 ╭─◀ ☕ j portable-5700u ▶ ~/drupal.org/facets_pretty_paths ▶ 📂4  📃15 🔗0 ▶ 🔀 2.0.x ▶
 ╰❯ $ patch -p1 < facets_pretty_paths-2952005-9.patch 
patching file facets_pretty_paths.services.yml
patching file src/Plugin/facets/url_processor/FacetsPrettyPathsUrlProcessor.php
Hunk #1 FAILED at 5.
Hunk #2 succeeded at 33 (offset 2 lines).
Hunk #3 FAILED at 65.
Hunk #4 FAILED at 83.
Hunk #5 FAILED at 169.
4 out of 5 hunks FAILED -- saving rejects to file src/Plugin/facets/url_processor/FacetsPrettyPathsUrlProcessor.php.rej
patching file src/RouteSubscriber.php

Similar result with patch 9 vs 8.x-1.x

 ╭─◀ ☕ j envy-4700u ▶ ~/drupal.org/facets_pretty_paths ▶ 📂4  📃12 🔗0 ▶ 🔀 8.x-1.x ▶
 ╰❯ $ patch -p1 < facets_pretty_paths-2952005-9.patch 
patching file facets_pretty_paths.services.yml
patching file src/Plugin/facets/url_processor/FacetsPrettyPathsUrlProcessor.php
Hunk #1 FAILED at 5.
Hunk #2 succeeded at 33 (offset 2 lines).
Hunk #3 FAILED at 65.
Hunk #4 FAILED at 83.
Hunk #5 FAILED at 169.
4 out of 5 hunks FAILED -- saving rejects to file src/Plugin/facets/url_processor/FacetsPrettyPathsUrlProcessor.php.rej
patching file src/RouteSubscriber.php

Still 4 out of 5 hunks failing

I suggest upgrading your facets_pretty_paths module to a more recent build before commenting on this issue.

https://www.drupal.org/project/facets_pretty_paths/releases/8.x-1.5 →