Please help me. When i upload new module

After i install freeBPX 2.5.1.0 but i don’t see IVR menu.
So i “Check for updates online” and has this error.

This is my error:
Downloading ivr Error(s) downloading ivr:
* Error opening /var/www/html/admin/modules/_cache/ivr-2.5.20.7.tgz for writing

Please help me. Thanks.

best guess, you have some permission problems. Try running the following command:

amportal chown

then try again.

Thank u so much.

I try: cd /admin/modules/_cache
then: amportal chown

SETTING FILE PERMISSIONS
Permissions OK

after all. i upload module again but it still so.
Downloading ivr Error(s) downloading ivr:

  • Error opening /var/www/html/admin/modules/_cache/ivr-2.5.20.7.tgz for writing

and
I download ivr-2.5.1.tgz to upload directly.
result:
Error creating temporary directory …/_cache/upload4a962c1f58956