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I installed TF Learn pro today

* In General Options, the pro version is greyed out, which would suggest it is not a pro version ?

* If I try to create a new course, module, lesson, page, question etc I get a 500 server error  with the following message from Joomla debugging :

Declaration of TfModelAdmin::preprocessForm(Joomla\CMS\Form\Form $form, $data)

Hello

Please install new version 1.6.5 Pro through Joomla manual installation.

Then, System -> Update Sites; Click on Rebuild. After this, automatic updates will work.

Hi, Can't download the file. The error message is: file not found.

Even though I couldn't install the new version manually, I followed the rest of your instructions. The automatic update showed up and once applied, the problems I mentioned earlier were fixed. Thank you for your reactivity !!