We are facing a problem with automatically created PDF.
Never the less if we are using “PDF” button or attach printout to mail. It looks like bootstrap.css is not used in that case.
If I am using “Full Page” bootstrap.css is used, so it’s available on server. I think, problem is at frappe.utils.print_format.download_pdf
ERPNext: v11.0.3-beta.2 () (staging)
Frappe Framework: v11.0.3 () (staging)