[Resolved] The Events Calendar 404 error when trying to access translated event single

Hey. I would very much appreciate it if the "open ticket button" actually opened up a ticket, instead of redirecting me to a braindead AI assistant. If I wanted to talk to ChatGPT, I think I'd be capable of using my browser's search bar on my own, instead of coming to your support page.

This is the actual report I wrote up, as opposed to the AI summary your system threw together:
The Events Calendar 404 error when trying to access translated event single

Use The Events Calendar plugin with WPML

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My site's default language is Hungarian, and I set up a translation for German. I encountered a problem with accessing the single events on the German version.
Sometimes, upon trying to open the german version of an event, I get a 404 error. This is not due to a faulty link - the permalinks work fine, and acessing it from the admin yields the same result. However, if I first open the Hungarian version, then navigate to the german or enter its link manually, then it starts working. It's as if the URL wasn't being properly rewritten (while the permalink was) until the Hungarian version of an event is first opened from the front-end. However, sometimes the german versions work from the get-go. I see no consistency in when the singles work and when they throw an error, however, the errors occur quite frequently.
Upon deleting my cache (I use WP Super Cache, Redis Object Cache and Autoptimize for caching) the whole thing repeats - so the German version of the event singles become inaccessible again until their Hungarian counterparts are opened.

Hi

I still see the issue occuring. It is inconsistent, with some events working from the get-go, others giving me a 404, only to then properly work a few minutes later, then going back to an error again. I'll send you a list of links here which currently produce the error for me:

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Also, one thing: as I said, switching between the versions actually "fixes" the issue - after visiting a post's default Hungarian version, the German version works until the cache is flushed.

I turned off the caching plugins to prevent them from interfering with any testing you do.

Here's the content of .htaccess:

FileETag none

# ----------------------------------------------------------------------
# Expires headers (for better cache control)
# ----------------------------------------------------------------------

# These are pretty far-future expires headers.
# They assume you control versioning with filename-based cache busting
# Additionally, consider that outdated proxies may miscache
# hidden link

# If you don't use filenames to version, lower the CSS and JS to something like
# "access plus 1 week".

<IfModule mod_expires.c>
ExpiresActive on

# Your document html
ExpiresByType text/html "access plus 0 seconds"

# Media: images, video, audio
ExpiresByType audio/ogg "access plus 1 month"
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType video/mp4 "access plus 1 month"
ExpiresByType video/ogg "access plus 1 month"
ExpiresByType video/webm "access plus 1 month"

# CSS and JavaScript
ExpiresByType application/javascript "access plus 1 year"
ExpiresByType text/css "access plus 1 year"
</IfModule>

# uploaded files
RewriteRule ^([_0-9a-zA-Z-]+/)?files/(.+) wp-includes/ms-files.php?file=$2 [L]

<ifModule mod_gzip.c>
mod_gzip_on Yes
mod_gzip_dechunk Yes
mod_gzip_item_include file .(html?|txt|css|js|php|pl)$
mod_gzip_item_include handler ^cgi-script$
mod_gzip_item_include mime ^text/.*
mod_gzip_item_include mime ^application/x-javascript.*
mod_gzip_item_exclude mime ^image/.*
mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</ifModule>

# Specify a Vary: Accept-Encoding header
<IfModule mod_headers.c>
<FilesMatch ".(js|css|xml|gz)$">
Header append Vary: Accept-Encoding
</FilesMatch>
</IfModule>

<IfModule mod_expires.c>

# Enable expirations
ExpiresActive On

# Default directive
ExpiresDefault "access plus 1 month"

# My favicon
ExpiresByType image/x-icon "access plus 1 year"

# Images
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType image/jpg "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 month"

# CSS
ExpiresByType text/css "access plus 1 month"

# Data interchange

ExpiresByType application/atom+xml "access plus 1 hour"
ExpiresByType application/rdf+xml "access plus 1 hour"
ExpiresByType application/rss+xml "access plus 1 hour"

ExpiresByType application/json "access plus 0 seconds"
ExpiresByType application/ld+json "access plus 0 seconds"
ExpiresByType application/schema+json "access plus 0 seconds"
ExpiresByType application/vnd.geo+json "access plus 0 seconds"
ExpiresByType application/xml "access plus 0 seconds"
ExpiresByType text/xml "access plus 0 seconds"

# Favicon (cannot be renamed!) and cursor images

ExpiresByType image/vnd.microsoft.icon "access plus 1 week"
ExpiresByType image/x-icon "access plus 1 week"

# HTML

ExpiresByType text/html "access plus 0 seconds"

# JavaScript

ExpiresByType application/javascript "access plus 1 year"
ExpiresByType application/x-javascript "access plus 1 year"
ExpiresByType text/javascript "access plus 1 year"

# Manifest files

ExpiresByType application/manifest+json "access plus 1 week"
ExpiresByType application/x-web-app-manifest+json "access plus 0 seconds"
ExpiresByType text/cache-manifest "access plus 0 seconds"

# Media files

ExpiresByType audio/ogg "access plus 1 month"
ExpiresByType image/bmp "access plus 1 month"
ExpiresByType image/gif "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 month"
ExpiresByType image/png "access plus 1 month"
ExpiresByType image/svg+xml "access plus 1 month"
ExpiresByType image/webp "access plus 1 month"
ExpiresByType video/mp4 "access plus 1 month"
ExpiresByType video/ogg "access plus 1 month"
ExpiresByType video/webm "access plus 1 month"

# Web fonts

# Embedded OpenType (EOT)
ExpiresByType application/vnd.ms-fontobject "access plus 1 month"
ExpiresByType font/eot "access plus 1 month"

# OpenType
ExpiresByType font/opentype "access plus 1 month"

# TrueType
ExpiresByType application/x-font-ttf "access plus 1 month"

# Web Open Font Format (WOFF) 1.0
ExpiresByType application/font-woff "access plus 1 month"
ExpiresByType application/x-font-woff "access plus 1 month"
ExpiresByType font/woff "access plus 1 month"

# Web Open Font Format (WOFF) 2.0
ExpiresByType application/font-woff2 "access plus 1 month"

# Other

ExpiresByType text/x-cross-domain-policy "access plus 1 week"

</IfModule>

<IfModule mod_deflate.c>
# Compress HTML, CSS, JavaScript, Text, XML and fonts
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
AddOutputFilterByType DEFLATE application/x-font
AddOutputFilterByType DEFLATE application/x-font-opentype
AddOutputFilterByType DEFLATE application/x-font-otf
AddOutputFilterByType DEFLATE application/x-font-truetype
AddOutputFilterByType DEFLATE application/x-font-ttf
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE font/opentype
AddOutputFilterByType DEFLATE font/otf
AddOutputFilterByType DEFLATE font/ttf
AddOutputFilterByType DEFLATE image/svg+xml
AddOutputFilterByType DEFLATE image/x-icon
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE application/json
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/xml

# Remove browser bugs (only needed for really old browsers)
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
Header append Vary User-Agent
</IfModule>

# RewriteCond %{HTTPS} off
# RewriteRule ^(.*)$ hidden link{HTTP_HOST}%{REQUEST_URI} [L,R=301]

RewriteCond %{HTTPS} off
RewriteCond %{HTTPS_HOST} !^wunderbar.tesztfejlesztes.hu$ [NC]
RewriteRule ^(.*)$ hidden link [L,R=301]

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# BEGIN WordPress
# The directives (lines) between "BEGIN WordPress" and "END WordPress" are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

# BEGIN LiteSpeed
# A `BEGIN LiteSpeed` és az `END LiteSpeed` sorok közötti tartalom dinamikusan lett létrehozva, és csak WordPress szűrők módosíthatják. E kettő sor közötti bármilyen kézi módosítás el fog veszni.
<IfModule Litespeed>
SetEnv noabort 1
</IfModule>
# END LiteSpeed

Unfortunately, the problem still persists. Please carefully perform the check as described.

Should I send you a video so that you take our case seriously and understand the problem? Perhaps we should hold a joint online meeting?