When you install the main JFBConnect zip file, that will also install the provider plugins (LinkedIn, Twitter, etc). Those plugins each have a check to make sure that JFBConnect is the right version (v9.0 or higher).
There shouldn't be an error like that though when installing as the component should be installed first, followed by the plugins.
Can you check/let me know the following:
* Verify you're using the latest JFBConnect zip file (com_jfbconnect_v9.0.197.zip)?
* If the install file is correct, can you let me know what version of JFBConnect you're upgrading from? We'll have to do some tests to make sure there isn't an issue with the upgrade process.
* Also, let us know what version of Joomla you are using.
Thanks!
Alex