Nextcloud version (eg, 10.0.2): All 12.0.x including 12.0.5
Operating system and version (eg, Ubuntu 16.04): iOS 11.2.5
Apache or nginx version (eg, Apache 2.4.25): 2.4.x
PHP version (eg, 5.6): 7.0
Hosting: OVH shared host, so limited access to configure the server.
Is this the first time you’ve seen this error?:
No, I have run into this error everytime since I use the NextCould client on this phone.
Can you reliably replicate it? (If so, please outline steps):
Yes, every time.
I use the NextCloud client typically to upload photos taken with this device, or documents downloaded from this device.
For the photos, the sequence is typically :
- Start the NextCloud app,
- click on the + button to upload files
- go to Upload photos or videos
- open the Recently Added
- select the photos and click Done.
The issue you are facing:
I get everytime a red warning at the top of the screen saying:
“Upload file
The server is temporarily unavailable”
If I stop the upload start it again, it is going through,
or after a while, it seems the files are uploaded.
So I would say it seems its working but no smoothly.
Same thing if I use 4G or Wifi.
No issue on the android version.
Thank you,
The output of your Nextcloud log in Admin > Logging:
The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):
<?php
$CONFIG = array (
'instanceid' => 'xxxxxxx',
'passwordsalt' => 'xxxxxxxx',
'secret' => 'xxxxxx',
'trusted_domains' =>
array (
0 => 'www.xxxxxx.com',
),
'datadirectory' => '/home/xxxxxx/xxxxxx/data',
'overwrite.cli.url' => 'https://www.xxxxxxx.com/xxxx',
'dbtype' => 'mysql',
'version' => '12.0.5.3',
'dbname' => 'xxxxxx',
'dbhost' => 'xxxxxxx',
'dbtableprefix' => 'oc_',
'dbuser' => 'xxxxxxx',
'dbpassword' => 'xxxxxxx',
'logtimezone' => 'UTC',
'installed' => true,
'theme' => '',
'loglevel' => 2,
'maintenance' => false,
'memcache.local' => '\\OC\\Memcache\\ArrayCache',
);
The output of your Apache/nginx/system log in /var/log/____:
No access to this.
Remember, this information may be requested if it isn’t supplied; for fastest response please provide as much as you can 
Feel free to use a pastebin service, otherwise log files can be indented with 4 spaces on each line to present them in a friendlier way on the forum.