Invalid URI: A URI must not start nor end with ASCII control characters or spaces.

If i click on "create new branch" i go to 404: Page not found

In ajaxFacetBlockView function of FacetBlockAjaxController file, remove space at the end of $path variable.
After line 122.
Something like this

$path = rtrim($path, '%20');

Thank you

rafal.tokarski → made their first commit to this issue’s fork.

I've added this line to take care of ASCII control characters.
$processed = is_string($processed) ? trim($processed) : $processed;