Nextcloud app error message after sync

šŸ“± Desktop & mobile clients
10

Hello,

First of all: Iā€™m a complete computer novice! I have absolutely no idea what to make of the following terms and concepts, such as:

Apache, web server, reverse proxy, AIO, NCP, bare metal/archive, Cloudflare, mod_security, Apache/nginx/system logs in /var/log/____:, occ config:list system, /path/to/nextcloud, occ app:list.

Youā€™ll need to explain everything to me in a way thatā€™s foolproof!

Ideally, tell me step by step, word for word, exactly how to do each thing.

And finally: Iā€™m using DEEPL for writing this!

Thanks fĆ¼r your understanding :slightly_smiling_face:

If you need more detailed information, please describe exactly where youā€™re stuck.

And now the support template!

The Basics

  • Nextcloud Server version : Nextcloud Hub 26 Winter 33.0.6
  • Operating system and version : Windows 11 Home 25H2
  • Web server and version : Iā€™ve no idea! Where can I find this information?
  • Reverse proxy and version _: Iā€™ve no idea! Where can I find this information?
  • PHP version : Where I can find this Info
  • Is this the first time youā€™ve seen this error? (No): see my first question
  • When did this problem seem to first start? see my first question
  • Installation method (e.g. AIO, NCP, Bare Metal/Archive, etc.) I downloaded the Nextcloud app for Hetznerā€™s ā€˜Storage shareā€™ Typ NX11 and installed it on my Windows 11 laptop.
  • Are you using Cloudflare, mod_security, or similar? (Yes / No) No idea, what this means!

Summary of the issue you are facing:

Whenever the Nextcloud app on my laptop synchronises with the server, I get the message: ā€˜File names containing the character ā€œ:ā€ are not supported by this system.ā€™. The error lies in the ā€˜colonā€™ ā€œ:ā€ in the file name; Iā€™m aware of that. However, at the time, I didnā€™t correct the incorrectly named file, but deleted it without fixing it! Since then, Iā€™ve been getting this message repeatedly, as shown in the image.

Steps to replicate it (hint: details matter!):

  1. Iā€™ve tried several times to upload a file with the incorrect filename again and then rename it when prompted to clear the message, but this has failed every time.

Log entries

Nextcloud

Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.

I canā€™t find this log file


  

  
PASTE HERE

Web Browser

If the problem is related to the Web interface, open your browser inspector Console and Network tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.


  

  
PASTE

Web server / Reverse Proxy

The output of your Apache/nginx/system log in /var/log/____:

Iā€™ve no idea where to find that! Iā€™m a complete novice!


  

  
PASTE HERE

Configuration

Nextcloud

The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):

Iā€™ve no idea where to find that! Iā€™m a complete novice!


  

  
PASTE HERE

Apps

The output of occ app:list (if possible).

Iā€™ve no idea where to find that! Iā€™m a complete novice!

Tips for increasing the likelihood of a response

  • Use the preformatted text formatting option in the editor for all log entries and configuration output.
  • If screenshots are useful, feel free to include them.
    • If possible, also include key error output in text form so it can be searched for.
  • Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.