[CLOSED] The directory shipstation is not allowed to be written to!

I'm trying to install shipstation. Download OC3 version.
Changed the filename from shipstationoc30.0.zip to shipstationoc30.0.ocmod.zip which allowed to to be uploaded with the extension installer.
I get the error:

The directory shipstation is not allowed to be written to!

and the progress bar is red and about 3/4ths complete. I have tried everything I can think of, including opening up the permissions to 777 throughout the site.
Any help would be appreciated.

No OC version posted. Move your system/storage outside your public_html folder and set writable recursive permission to that folder. Then, adjust the new path accordingly from your config.php and admin/config.php files and clear all caches from the Opencart admin as well as from your browser. This should resolved the issue.

[OC 3.0.2.0]
Thank for this, but it did not resolve my issue. The directory and config setting were already in place, although there is also a storage directory under the system directory that is inside the public_html dir.
I can see that the file is uploaded and unzipped under the upload folder. I tried manually copying the shipstation folder into the vendor folder and the admin folders into the regular admin folders, but it never showed up under modifications. I have searched but can't find instructions for OC 3 manual installation.
I did a clean install elsewhere and tried installing there with the same failed results.
Are there any other things I can try?

although there is also a storage directory under the system directory that is inside the public_html dir.

While my previous reply did not indicated any move out to the vendor folder regarding the issue you are reporting, the system/storage must be moved outside your public_html folder and set writable permission from FTP. Then, ensure from the config.php and admin/config.php files that the new path for the storage folder is also modified for the new location.

In your .htaccess file, also remove the system/ term in front of the storage term. Clear all caches and refresh the site on your browser. This should rectify the issue.

Everyone who experience this kind of issue,
Please just install this extension:

https://www.opencart.com/index.php?rout ... n_id=33410

It will fix the directory limitation upon installing an extension.

OpenCart intoduced with 2.x the limitation to write into folders.
Since then, only specified folders/directories are allowed - has several reasons (and they are all valid!).

So, if an extension wants to write into any directory not allowed by the system, this message is displayed.

Installing that extension which brings back to write into any, is the worst idea someone can have!
Why?
2 reasons:
1. developer is/was too lazy to convert his old extension to the new format (and restriction)
or
2. developer is not understanding why this restriction was introduced

The user now has 5 options:
A. request an update from the developer
B. fix it by yourself
C. hire a professional (if #B is not possible)
D. use another extension (mostly there are several doing the same)
E. use the above mentioned extension - not recommended