When downloading large files in NextCloud from a LiteSpeed server the download fails after 500mb. The following error is recorded in error logs: The size of dynamic response body is over the limit, abort!
This is set in LiteSpeed Admin Console under Server >Tuning > Max Dynamic Response Body Size (bytes)
But if We wan’t to disable this limit just for that account/website simply add the following to the beginning of the .htaccess file:
RewriteRule .* - [E=noabort:1]
Source: PHP Without Timeout