I am running into an error while attempting to install Admin Tools Pro v4.1.1 into a brand new clean installation of Joomla.
I've attached two screen shots: the first has the details of the environment (taken from Joomla's System Information / System Information Tab), and the second is the error messages displayed by the Extensions / Manage / Install / Upload Package file.
By the way, I have successfully installed Akeeba Backup Professional v5.3.1.
Any assistance and/or insight you can provide would be greatly appreciated.
Best regards,
James