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Error Applying patch 26.100.0175-2 Failed to load webpack.config.ts

  • May 30, 2026
  • 1 reply
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Hi everyone!

I’m trying to apply this patch 26.100.0175-2 but after begining the Starting UI compilation, this error comes up: 

[16:55:41 INF] Starting UI compilation
[16:58:04 ERR] build failed with exit code 2 in C:\Program Files\Acumatica ERP\Demo26R1\FrontendSources\screen
[16:58:04 ERR] build stderr:
[webpack-cli] Failed to load 'C:\Program Files\Acumatica ERP\Demo26R1\FrontendSources\screen\webpack.config.ts' config
[webpack-cli] webpack.config.ts(24,8): error TS2307: Cannot find module 'build-tools' or its corresponding type declarations.
webpack.config.ts(28,8): error TS2307: Cannot find module 'build-tools/logger' or its corresponding type declarations.
webpack.config.ts(31,8): error TS2307: Cannot find module 'transformers/logger' or its corresponding type declarations.
webpack.config.ts(34,31): error TS2307: Cannot find module 'transformers/constants' or its corresponding type declarations.

I ran the get npm run getmodules and it created the build-tools folder inside the FrontendSources/node_modules. But the build-tools folder dissapears when I try to patch my instance.

1 reply

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hello ​@albertobello83 

if build-tools exists after getmodules but disappears during patching, pre-running getmodules is not enough. The patch process is likely replacing or cleaning part of FrontendSources before it starts the production UI compilation.

A current 2026 R1 PatchTool thread confirms 26.100.0175-2 is the patch being detected for 26.100.0175, and that PatchTool ZIP/extracted files can also be blocked by Windows unless you unblock them first.

To Unblock ZIP/Folder right click → Properties →  In General tab at bottom Unblock checkbox → check it  → Press OK

OR

Run PowerShell as Administrator:

Get-ChildItem -Path "C:\Path\To\PatchTool" -Recurse | Unblock-File


Follow this Posts if any further info - Link1 & Link2
& if it help’s then like there posts too.