Blank page - Several browsers and platforms

Hi everyone,

I've just finished installing MM 3.0.2 and in several cases (my coworkers and Chrome in my Android phone) display the login URL but with a blank page. My installation URL is: https://mm.initech.pw/

So far this is what I've found:
Ubuntu 14.04 - Chrome - Version 50.0.2661.102 (64-bit) --> WORKS
Ubuntu 14.04 - Firefox 46.0 --> WORKS
Android - Chrome 50.0.2661.89 --> BLANK PAGE
Ubuntu 14.04 - Chrome - 50.0.2661.86 (64-bit) --> BLANK PAGE
Ubuntu 14.04 - Firefox - 46.0.1 --> BLANK PAGE
Ubuntu 16.04 - Firefox 46.0.1 --> BLANK PAGE
Ubuntu 16.04 - Chrome 48.0.2564.116 (Build oficial) (64 bits) --> BLANK PAGE
Ubuntu 16.04 - Chrome - Version 50.0.2661.102 (64-bit) --> BLANK PAGE

As you can see, the first and the last results are using the same browser release!

Log file doesn't show anything abnormal that I should care about:

[2016/05/23 11:46:59 ART] [INFO] Enterprise Enabled: false
[2016/05/23 11:46:59 ART] [INFO] Current working directory is /opt/mattermost
[2016/05/23 11:46:59 ART] [INFO] Loaded config file from /opt/mattermost/config/config.json
[2016/05/23 11:46:59 ART] [INFO] Server is initializing...
[2016/05/23 11:46:59 ART] [INFO] Pinging sql master database
[2016/05/23 11:46:59 ART] [INFO] Pinging sql replica-0 database
[2016/05/23 11:46:59 ART] [INFO] Starting Server...
[2016/05/23 11:46:59 ART] [INFO] Server is listening on :8065
[2016/05/23 11:46:59 ART] [INFO] RateLimiter is enabled
[2016/05/23 11:47:05 ART] [INFO] Stopping Server...
[2016/05/23 11:47:12 ART] [INFO] Current version is 3.0.0 (3.0.2/Tue May 17 21:26:28 UTC 2016/ac509b114df1c1b4b841eded74fb797805e0162d)
[2016/05/23 11:47:12 ART] [INFO] Enterprise Enabled: false
[2016/05/23 11:47:12 ART] [INFO] Current working directory is /opt/mattermost
[2016/05/23 11:47:12 ART] [INFO] Loaded config file from /opt/mattermost/config/config.json
[2016/05/23 11:47:12 ART] [INFO] Server is initializing...
[2016/05/23 11:47:12 ART] [INFO] Pinging sql master database
[2016/05/23 11:47:12 ART] [INFO] Pinging sql replica-0 database
[2016/05/23 11:47:12 ART] [INFO] Starting Server...
[2016/05/23 11:47:12 ART] [INFO] Server is listening on :8065
[2016/05/23 11:47:12 ART] [INFO] RateLimiter is enabled

Would you help me find out what's wrong with that?

Thanks in advance!