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  • Frequently Asked Questions Articles
    403 - Forbidden causes

    This article describes what to do if users see the following errors:...

    AD password change or reset failure

    If you are using Active Directory (AD) as user backend, and see that the password reset feature or password changing feature does not work despite activation in the configuration, this article explains how to resolve this issue....

    Cannot upload very large files

    If a user is trying to upload huge files, this operation can fail if the configuration is not finetuned to handle such large files. This operation usually creates errors like the following:...

    Changes are not applied after a page refresh

    If a user is doing operations or changes in the web UI, and then refreshes the page, it can occur that th change is not applied....

    Common functionality questions

    This section documents the frequent questions about the Nextcloud functionality....

    Decryption error bad signature

    The following error appears while accessing an encrypted file:...

    Decryption error cannot decrypt this file

    When encryption was enabled and disabled without decrypting all the files, some users see the following error while accessing an encrypted file: Cannot decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file w...

    Decryption issues in a SAML use-case

    If you are using SAML, and see decryption errors or decoding errors, this article explains how to resolve these type of issues....

    Encryption error - multikeyencryption failed

    Encryption is failing with the following error: multikeyencryption failed...

    External storage changes are not detected nor synced

    If you have an external storage configured, and you or your users are modifying, adding, or deleting files into this storage without first going through Nextcloud (like the web user interface or Nextcloud clients), the modified files are sometimes no...

    How to remove a subscription key from an instance

    Let's say, you want to duplicate your instance by copying a VM and use the duplicate as a sandbox (or a test server), but you don't want to have user limit applied based on your subscription key....

    Low upload speeds with S3 as primary storage

    If you have S3 as primary storage, and upload a file, and see that the speed is peaking at low speeds (e.g. 10 MB) then this article is for you....

    Old version still shown after successful update

    Sometimes, it can happen that an update has been available and successfully executed, but the old version is still shown....

    Performance problems

    This article describes the most common causes of a bad performance or when Nextcloud is slow, and how to make Nextcloud fast again. This page describes how the support team analyses these systems....

    Permissions error in appdata

    This article describes what to do if you see the following errors:...

    Transfer ownership is missing shares

    When transferring ownership, it can happen that some shares were not transferred correctly....

    Useful SQL queries

    This page describes SQL queries that are useful for solving several issues....

    User id change

    Root cause analysis...