Hii,

Clear All Custom Assets and Templates (if any):

If you've inherited or modified any of the following templates, they could be causing issues:

• web.external_layout
• web.external_layout_standard
• web.report_layout
• web.basic_layout
• web.minimal_layout
• report.external_layout

Run this SQL query to check for overridden views:

SELECT id, name, key, inherit_id, arch_db

FROM ir_ui_view

WHERE key LIKE 'web.external_layout%'

   OR key LIKE 'web.report_layout%'

   OR key LIKE 'report.external_layout%';

If you see custom/inherited views, you can temporarily disable them (set active=False) and re-test reports.

Force Rebuild Assets

Even though you've regenerated assets, do it again from a clean state:

# Stop Odoo first

./odoo-bin --stop-after-init

# Remove old assets

find ./ -name "*.assets.json" -delete

rm -rf ./odoo/addons/web/static/lib/*   # optional: reset vendored libs if changed

# Restart with assets reset

./odoo-bin -u base,web,web_editor --dev=all --stop-after-init

Also clear browser and wkhtmltopdf caches if needed.

Check PDF Engine: wkhtmltopdf

Ensure you're using a supported version of wkhtmltopdf. For Odoo 17:

• ✅ Recommended: 0.12.6 (with patched Qt)
• ❌ Known broken styles: 0.12.5 or default system versions

Test:

wkhtmltopdf --version

Enable Developer Mode and Test Built-in Report

Open Developer Mode and test a core report like:

• Sales Order Report: Sales > Orders > Print > Quotation / Order

If this still fails, it's not caused by custom templates, but likely asset loading or rendering engine issues.

Verify Asset Bundles are Available

From browser DevTools (F12):

• Go to any printable report preview.
• Open Network tab.
• Check if CSS files like web.assets_common.css, web.report_assets_common.css, web.report_assets_pdf.css are loading.

If they 404 or are missing, regenerate with:

./odoo-bin --dev=all -u base,web,web_editor --stop-after-init