Permission denied on accessing Modules

After I add modules, I am not able to access them. Error is "Permission Denied...contact system admin..".
I have check the user group and users, there are no options for the newly added modules.
So I unchecked all and rechecked all just in case, still would not work.

I even tried to go into the database and manually add them to the user group and this did not work.

I am on 2.1.02 . I am not sure what is going on.

Where exactly have you uploaded your modules into?
Once the uploaded modules have been uploaded into the right locations, you'll have the option under system->user->usergroups to permit access to them.
If you are not able to see the installed module, maybe is this not appropriated to this OC version or you might have installed into the wrong location.

I am reading a lot of posts lately that others are having this problem, I am also. Most of the mods I am attempting in OC 2.2.
Mods appear to be installed, under Modifications, etc. But they are actually not appearing in the list for Permissions under User Groups. Hope someone can shed some light on this soon.

Are you using OpenCart 2.3? If so, old extensions will not work properly unless they've been specifically updated, or you're using something like my OpenCart 2.3 Extension Compatibility Fix. If you install an old extension without that, you'll get permission errors like you're describing.

If you're using an older version (like ShelbyW said she was using 2.1) then it's possible you're installing an extension that was designed for 2.3, which isn't going to work. If that's not it, are you sure the extension files are in the right location? Just because an ocMod file appears in Extensions > Modifications, that doesn't mean the other extension files are in the correct places.

For reference, for an extension to appear in the Permissions list, you need to have its controller file in place:

/admin/controller/TYPE/EXTENSION.php

For example:

/admin/controller/shipping/flat.php

Yeah, I personally always verify that all mods I am using are in accordance with the proper OC version...

I have noticed that some of the mods I was having problems with are responding perfectly fine when I upload them through FTP.
They show up in my User Groups, I can set Permissions, and access the mods -
Even though the Extension Installer worked, and they showed up in my "Modifications" previously, I was not able to set permissions in User Groups. Not sure why.

However, FTP is working fine... Anyone with this error in the Extension Installer may want to try your mods through FTP method.

klyn05 wrote:I have noticed that some of the mods I was having problems with are responding perfectly fine when I upload them through FTP.
They show up in my User Groups, I can set Permissions, and access the mods -
Even though the Extension Installer worked, and they showed up in my "Modifications" previously, I was not able to set permissions in User Groups. Not sure why.

However, FTP is working fine... Anyone with this error in the Extension Installer may want to try your mods through FTP method.

That sounds to me as a server issue.
Have you ever checked the owner and permission of the folders and files?