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From: https://www.inflectra.com/support/knowledgebase/kb306.aspx By default, IIS web server allows for limited file size to be uploaded to the web server. For IIS 6 and IIS 7, the default maximum file upload size is 4 MB and 28.6 MB respectively. IIS 7 returns a 404 error (HTTP Error 404.13 - CONTENT_LENGTH_TOO_LARGE) if someone uploads something ...


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Apparently we use a shared hosting server as part of our package, so we cannot see the apache logs. However the host did eventually check the logs, and said "We have checked the Apache error logs and discovered that the issue has been caused by a triggered ModSecurity rule. ModSecurity has conflicts with some scripts and plugins which may result in false-...


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Your Contact Form 7 is using accept=".pdf" on the file input HTML. This instructs browsers that know how, to only show files which have a file name matching the pattern. Ideally your contact form would also specify the PDF mime type which would give slighty wider browser support, especially on mobile: accept=".pdf,application/pdf". However, even that ...


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