Webclient Upload Large Files did not finish (JPG / EXE / MOV / ....)

Nextcloud version : 13.0.2 RC 1
Operating system and version: Debian 9.4
Apache or nginx version (eg, Apache 2.4.25): Apache 2.4.25 / nginx 1.13.8
PHP version : 7.1.16
other: plesk onyx 17.8.11

The issue you are facing: Uploading of .JPG did not finish

Is this the first time you’ve seen this error?: Y

Steps to replicate it:

  1. select a .JPG file size 7MB and Up
  2. start uploading
  3. after 90% nothing happens

The output of your Nextcloud log in Admin > Logging: nothing

If i open the console in chrome I see this:

Uncaught TypeError: Cannot read property merged-index.js?v=bfa08785-3:1304 Uncaught TypeError: Cannot read property ‘message’ of undefined
at HTMLInputElement.fail (merged-index.js?v=bfa08785-3:1304)
at e.(/index.php/apps/files/anonymous function).(anonymous function)._trigger (https://cloud.tobasium.de/core/vendor/core.js?v=bfa08785-3:13:10075)
at e.(/index.php/apps/files/anonymous function).(anonymous function)._onFail (https://cloud.tobasium.de/index.php/js/files/merged-index.js?v=bfa08785-3:2656:18)
at e.(/index.php/apps/files/anonymous function).(anonymous function)._onFail (https://cloud.tobasium.de/core/vendor/core.js?v=bfa08785-3:13:5077)
at merged-index.js?v=bfa08785-3:2690
at j (core.js?v=bfa08785-3:2)
at Object.fireWith [as rejectWith] (core.js?v=bfa08785-3:2)
at Object. (merged-index.js?v=bfa08785-3:2587)
at j (core.js?v=bfa08785-3:2)
at Object.fireWith [as rejectWith] (core.js?v=bfa08785-3:2)

If i upload a big file from 7z the upload finished.

Maybe someone could help me with the problem.