Hello,
I am experiencing a critical issue with the UXP development environment on Premiere Pro 25.3 that prevents me from loading any UXP extension, including basic starter templates created with the UDT.
The UXP Developer Tool consistently fails with the error: "No applications are connected to the service."
This issue is persistent across multiple Premiere Pro versions (2025 and 2024) and has survived a complete, clean reinstallation of the entire Adobe CC suite.
**System Information:**
* **OS:** Windows 11 Home
* **Premiere Pro Version:** 25.3.0
* **UXP Developer Tool Version:** 2.1.0.30
**Key Symptoms:**
* The "Scripting & Expressions" preference menu is completely missing in both Premiere Pro 2025 and 2024.
* The UDT fails to load any plugin, reporting "No applications are connected to the service."
* This occurs even though the UDT service is confirmed to be running and listening on its port (verified via `netstat`).
**Exhaustive Troubleshooting Steps Taken:
including:
* Full clean reinstall of Premiere Pro (2025 and 2024) using the CC Cleaner Tool.
* Full clean reinstall of the *entire* Creative Cloud suite, including the CC Desktop App, after using the official CC uninstaller and the CC Cleaner Tool.
* Complete manual reset of all user profile folders (renaming AppData and Local AppData Adobe folders).
* Full reset of the Windows Network Stack (`netsh winsock reset`, etc.).
* Confirmed all third-party antivirus software (Malwarebytes) is uninstalled and only Windows Defender is active.
* Temporarily disabled Windows Defender Firewall for testing.
* Created explicit outbound firewall rules for both the Premiere Pro application and specific UDT ports.
* Confirmed UXP Developer Mode is forced globally via the `settings.json` file.
* Located and removed all old CEP `.debug` files.
**Key Log Finding
After all cleaning and reinstallation procedures, a fresh Premiere Pro launch log (`%APPDATA%\Adobe\Premiere Pro\25.0\logs`) still shows a critical failure in the Adobe Identity Management service, even after the local profile corruption errors were resolved:
`[Error] [console] [Hu-1] Failed to create/get SAMAssetContext: TypeError: window.cdoHost.getUserAccessTokenSync is not a function`
This strongly suggests the root cause is a failure of a core Creative Cloud identity component, which prevents the entire UXP subsystem (including its preference menus) from initializing correctly.
Given the exhaustive troubleshooting, this appears to be a deep environmental or product bug. We have exhausted all possible user-level fixes. We kindly request assistance from the engineering team to diagnose this issue further.
Thank you for your time and help.
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