Flux CP Permission denied

[Flux CP Permission denied]

I received this error after installing the flux cp. Im on CentOS 7.

 

Warning: fopen(data/tmp/ConfigServers.cache.php): failed to open stream: Permission denied in /var/www/html/flux/lib/Flux.php on line 275
Warning: fwrite() expects parameter 1 to be resource, boolean given in /var/www/html/flux/lib/Flux.php on line 276
Warning: fwrite() expects parameter 1 to be resource, boolean given in /var/www/html/flux/lib/Flux.php on line 277
Warning: fclose() expects parameter 1 to be resource, boolean given in /var/www/html/flux/lib/Flux.php on line 278
Warning: fopen(data/tmp/LangEnUs.cache.php): failed to open stream: Permission denied in /var/www/html/flux/lib/Flux.php on line 275

 

I've already tried several methods suggested in the forum including :

1. Set the rights for data/tmp to 777
2. Set the owner of data/tmp to apache
3. Delete all the files inside data/tmp
   

I have been working on this for the whole day but still cannot get it to work.