Hello,
Since the last update of Admin Tools, we have some touble to access to the component's administration (see attached file).
We have this issue on several websites hosted on IIS. I was able to reproduce the problem on my local environnment.
The problem happen here :
\administrator\components\com_admintools\Model\WebConfigMaker.php
line 371 ServerTechnology::checkCaller($this->allowedCallersForMake);
Here is the content of $this->allowedCallersForMake :
array (size=6) 0 => 'Akeeba\AdminTools\Admin\Controller\ServerConfigMaker::apply' (length=59) 1 => 'Akeeba\AdminTools\Admin\Controller\WebConfigMaker::apply' (length=56) 2 => 'Akeeba\AdminTools\Admin\Model\ServerConfigMaker::writeConfigFile' (length=64) 3 => 'Akeeba\AdminTools\Admin\Model\WebConfigMaker::writeWebConfig' (length=60) 4 => 'Akeeba\AdminTools\Admin\View\WebConfigMaker\Html::onBeforeMain' (length=62) 5 => 'Akeeba\AdminTools\Admin\View\WebConfigMaker\Html::onBeforePreview' (length=65)
Let me know if you need more details.