The form does not show

• Check the shortcode is exactly

  Please log in to use the support desk. Log in

  and in a shortcode block.
• If a logged-out visitor sees "Please log in to use the support desk.", either log in or turn on guest tickets. See "Allowing guest tickets".
• If a logged-in person sees "Your account cannot submit support tickets.", their role cannot open tickets. Only Subscriber, Customer, Support Agent and Administrator can. See "Who can submit tickets (and why an Editor cannot)".
• If you used form="slug", check the slug is right and the form is enabled. An administrator sees a notice if the form is disabled or does not exist.

The form will not submit

• Too many tickets? You see "You have submitted too many tickets recently. Please try again later." Wait and try again. See "Spam protection and rate limits".
• Caching: exclude your support pages from page caching, so the security check stays fresh.
• Required fields: check every required custom field is filled in.
• Plugin clash: briefly turn off other plugins to find a conflict.

Attachments will not upload

• You can attach one file to a ticket and one to each reply. Internal notes cannot take files.
• Check the file type is allowed: JPG, JPEG, PNG, GIF, PDF, TXT, LOG, CSV, ZIP, DOC, DOCX, XLS and XLSX. Otherwise you see "That file type isn't allowed. Allowed types: …". Log files ending in .log are accepted as plain text.
• Check the size is under 10 MB and under your server's upload limit. The error reads "Attachment exceeds the maximum allowed size (10 MB)." The smaller of the two limits applies.
• A renamed file (for example an .exe renamed to .pdf) is refused, because the contents are checked.
• If you built the form with the Forms module, check that attachments have not been hidden on it.

There is no setting for the allowed types or size; developers can change them with filters. See "Developer guide: REST API, hooks and events".

Still stuck? Open a ticket on the support page on ABC and a real person will help.