Exception: Could'n find a CalDAV-collection under the url



If you think there is a bug in SimpleCalDAV, please report the following information on github or send it at palm.michael@gmx.de.



For debugging purposes:

last request:

OPTIONS /remote.php/dav/calendars/matthias/laguna/ HTTP/1.1
Host: cloud.mb2k.de
User-Agent: cURL based CalDAV client
Accept: */*
Content-type: text/plain


last response:

HTTP/1.1 503 Service Unavailable
Server: nginx
Date: Mon, 20 Apr 2026 10:42:19 GMT
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
X-Powered-By: PHP/8.4.20
Content-Security-Policy: default-src 'self'; script-src 'self' 'nonce-oMx6/egQWz0kLyToW3nK77MyoH2Th97U+p6GcCulm9U='; style-src 'self' 'unsafe-inline'; frame-src *; img-src * data: blob:; font-src 'self' data:; media-src *; connect-src *; object-src 'none'; base-uri 'self';
Set-Cookie: oc_sessionPassphrase=3rYDSWJszWjsLjlzR4erFrxivyFTiLZ6ivRO787baU%2FFRQvOd8kQPBIXJNODrTAQgJiomOGrVASRxwmG68HjnfIbNw9PeWgAAdXwrqrssz6MH443ZV5fzRWyT6pqIPET; path=/; secure; HttpOnly; SameSite=Lax
Set-Cookie: __Host-nc_sameSiteCookielax=true; path=/; httponly;secure; expires=Fri, 31-Dec-2100 23:59:59 GMT; SameSite=lax
Set-Cookie: __Host-nc_sameSiteCookiestrict=true; path=/; httponly;secure; expires=Fri, 31-Dec-2100 23:59:59 GMT; SameSite=strict
Set-Cookie: och8rmobqgs5=d568bf80daabc55b9b445589f441a22e; path=/; secure; HttpOnly; SameSite=Lax
Strict-Transport-Security: max-age=15552000; includeSubdomains;
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-Permitted-Cross-Domain-Policies: none
X-Robots-Tag: noindex, nofollow
X-XSS-Protection: 1; mode=block
Referrer-Policy: no-referrer



Trace:

#0 /var/www/vhosts/lagunaxp.de/httpdocs/wp-content/plugins/calendar/calendar.php(12): SimpleCalDAVClient->connect()
#1 {main}