[Bug report] "Rendering process failed" after latest update

[scottsemple]

Operating system

macOS Tahoe 26.0.1

Publii version

0.47.2

Issue type

Application

Bug description

I updated to the latest versions of Publii (0.47.2) and the Simple theme (3.2.0.0), then made some edits on an existing post, and clicked Preview Changes. No other changes were made.

Steps to reproduce

No response

Relevant log output

Rendering process failed
An error occurred during rendering process:

ENOENT: no such file or directory, open '/Users/name/Documents/Publii/sites/test-site/input/themes/simple/assets/css/main.css'

Error: ENOENT: no such file or directory, open '/Users/name/Documents/Publii/sites/test-site/input/themes/simple/assets/css/main.css'
    at Object.openSync (node:fs:561:18)
    at Object.func [as openSync] (node:electron/js2c/node_init:2:2617)
    at FileHelper.readFileSync (/Applications/Publii.app/Contents/Resources/app.asar/back-end/helpers/file.js:16:21)
    at Renderer.getMainCSS (/Applications/Publii.app/Contents/Resources/app.asar/back-end/modules/render-html/renderer.js:1961:27)
    at Renderer.generateCSS (/Applications/Publii.app/Contents/Resources/app.asar/back-end/modules/render-html/renderer.js:1895:28)
    at Renderer.generateWWW (/Applications/Publii.app/Contents/Resources/app.asar/back-end/modules/render-html/renderer.js:238:14)
    at Renderer.renderFullPreview (/Applications/Publii.app/Contents/Resources/app.asar/back-end/modules/render-html/renderer.js:194:20)
    at Renderer.renderSite (/Applications/Publii.app/Contents/Resources/app.asar/back-end/modules/render-html/renderer.js:175:28)
    at Renderer.render (/Applications/Publii.app/Contents/Resources/app.asar/back-end/modules/render-html/renderer.js:120:24)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)

[bobmitro]

For some reason, the file main.css is missing in this location:
/Users/name/Documents/Publii/sites/test-site/input/themes/simple/assets/css/main.css

Adding this file should solve the problem.