Download failed on large file

Hey all. I sent a download link from my nextcloud server to a friend, but it failed several times. I think it has to do with the file size, which was over 1.5GB, but I’m new to all this and I don’t know where to change the size limit.

For reference, I’m running NC as a TrueNAS jail and using NGINX proxy manager running in a docker container as the proxy. The files are all located on mounted external storage, which is my TrueNAS pool.

Any help would be much appreciated, thanks!