In continuation to my previous question https://drupal.stackexchange.com/questions/208245/openatrium-installation-profile-error
I have another problem in the very next step i.e. during Site Configuration.
Firstly the theme seems to have broken because CSS is not being applied.
Secondly, I'm getting the error message.
"Warning: file_put_contents(temporary://fil3BF3.tmp): failed to open stream: "DrupalTemporaryStreamWrapper::stream_open" call failed in file_unmanaged_save_data() (line 1936 of \includes\file.inc).
•The file could not be created."
I understand from some other posts that this is due to missing permissions on "sites/default/files" folder. But this folder is created on the fly during installation how do we give access to it. In addition, I believe another possible cause can be due to permissions to "tmp" folder. Most of the other posts mention changing that path in "Admin -> configuration" somewhere, but for that OpenAtrium needs to be completely installed. Where can I change the path for "tmp" file through file system.
Appreciate a reply.