Following your prev instructions, verified the Library installed is v1.0.9...went ahead and purged/refreshed cache with no resulting changes. Then, set Error Reporting to "Maximum" and verified GZip was turned off.
With the latest JFBC 4.3.2 already installed and before another attempt to upgrade JLinked from 1.3 to 1.4, I noticed that versions of the library in the below snip seemed odd...maybe this is an issue, maybe not..?
Next, attempted to update JLinked to v1.4 via the component and received an error message "unable to open archive...cannot extract package...please update manually". After manually uploading/installing via the extension Manager, the following error resulted:
For grins, then did a manual reinstall of JFBC4.3.2 via the extension Manager. The following 2 snips show the component status after the reinstall as well as what now is displayed on the frontend url.
Lastly, was still unable to run the Autotune since the component could not validate my latest subscription, fyi.
Hope this helps!
Thanks.