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> This is a newly developing issue, and as such the information in this article may change over time.
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## Error message - Access to fetch at `https://127.0.0.1:18623` or `http://127.0.0.1:18622` has been blocked by CORS policy: Permission was denied for this request to access the unknown address space.
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## Error message - CORS Errors caused by local network access permissions when using Chromium 142 and later
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### Symptom
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When using Chromium-based browsers version 142 or later (released on October 28th, 2025), including Chrome, Edge, Brave, and Opera, the Dynamsoft Web TWAIN Service may fail to function properly:
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When using **Chromium-based browsers version 142 or later** (released on October 28th, 2025), including Chrome, Edge, Brave, and Opera, the Dynamsoft Web TWAIN Service may fail to function properly:
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- Phenomenon 1: the browser prompts users to download the service installer even though it is already installed.
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@@ -41,22 +41,27 @@ This affects the Dynamic Web TWAIN Service which relies on local services for co
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### Resolution
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***Step 1: (For All End Users)***
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***1. To Manually Correct This in Chrome***
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- Navigate to your Dynamic Web TWAIN web interface
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- Click the lock icon (or settings icon) next to your site URL in the browser’s address bar.
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- Ensure that **Local Network Access** is enabled.
30.[How to debug on Dynamic Web TWAIN online demo?](/_articles/faq/debug-on-online-demo.md)
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31.[Dynamic Web TWAIN prompts the .deb installer for Windows](/_articles/faq/incorrect-installer-for-windowsARM64.md)
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32.[Why am I unable to load the TIFF file into Dynamic Web TWAIN?](/_articles/faq/unable-to-load-4-bit-tiff.md)
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33.[Error message - Permission was denied for this request to access the unknown address space](/_articles/faq/chromium-142-local-network-access-issue.md)
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33.[Error message - CORS Errors caused by local network access permissions when using Chromium 142 and later](/_articles/faq/chromium-142-local-network-access-issue.md)
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