# 3.15.4 Release Notes Squirro 3.15.4 was released on April 27, 2026. Learn more about the [Squirro Release Process](../squirro-release-process.md#getting-squirro-process). > **Notes for administrators** > > - This release introduces important changes that may require adjustments to your existing setup. [Learn more](#breaking) ## Improvements ### AI - Supported file types tooltip and filter on the chat attachment button. ### Platform - REST API for programmatic file management in Squirro projects, supporting upload, listing, download, and deletion. - Workspace renaming available via the interface and through the `SquirroClient` `update_workspace` method. - JWT authentication support. - New Studio plugin for JWT validation. - File content download with secure authentication. ## Bug Fixes - Item detail panel opening unexpectedly when navigating to a Chat dashboard. - Case-insensitive email uniqueness not enforced in PostgreSQL. - Restricted log file and log data endpoints to Cluster Admins only. - Semantic search failing in OpenSearch. - Restrict sample email sending to users with Cluster Admin or Workspace Admin role. - Restricted list users and list groups endpoints to users with project management permissions (Cluster Admins and Cluster Users). - List users and list groups access extended to Project Admins. ## Known Issues - In specific scenarios, cross-lingual information retrieval for semantic search may deliver lower-than-expected quality (SQ-28171). - An error may occur when chatting with an uploaded .pptx file in Squirro Chat (SQ-31480). ## Breaking Change - The PDF viewer now requires a license key and additional Content Security Policy directives. For an overview and instructions on obtaining a license key, see the [PDF Viewer](../../../technical/admin/configuration/pdf-viewer.md#pdf-viewer-introduction) page. For configuration details, see the [PDF Viewer License Key](../../../technical/admin/configuration/secure-config-guide.md#admin-pdf-viewer-license) and [Recommended Minimal Policy](../../../technical/admin/configuration/secure-config-guide.md#admin-csp-minimal-policy) sections. ## Installation and Upgrade For new installations, find step-by-step instructions on the [Install and Manage Squirro with Ansible](../../install/ansible/index.md#ansible) page (recommended) and [Installing Squirro on Linux](../../install/linux.md#install-linux) pages. To upgrade an existing installation, see the [Upgrading Squirro](../../install/upgrade.md#install-upgrade) page.