No permission to upload or create files here

Server
1

After installation of owncloud, I try to upload a file to the owncloud but I’m getting permission issue:

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image.png1362x135 8.28 KB

All the users including admin are not able to upload any files.
This is the first time I’m using owncloud.
This is my settings:

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image.png1349x662 39.4 KB

2

I also have MySQL and nginx installed.

3

please share related owncloud.log entries. The file is located under data folder.

5

owncloud.log (13.1 KB)

this is the file