如何附加PDF文件？

[merefield (Robert)]

You might need to update your nginx config too if the files are very large:

Image Uploading Size Show Exceeding Though It's Less

I guess the new update added a hint about fixing this, so here is the full guide for those who face the same issue… it’s all about nginx: 1. Go to nginx folder: cd /etc/nginx 2. Add this line to your nginx.conf file: http { ... client_max_body_size 4M; } This will allow nginx to accept files with a max size of 4 megabytes. 3. Restart nginx: If you’re paranoid like me use run systemctl restart nginx Or simply send the nginx restart signal by running nginx -s reload