Administration - Installation - Core: How to upload Didactic Templates given in "

Hello ILIAS World,

I have an installed latest ILIAS 6 release. I just wanted to upload some of those given free Didactic Templates HERE. However all of our trials failed. Please find below the error message I am experiencing:

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Error thrown with message "Call to a member function setImportId() on bool" Stacktrace:#12 Error in /home/isgansiklopedisi/public_html/Services/AccessControl/classes/class.ilRoleXmlImporter.php:229#11 ilRoleXmlImporter:initRole in /home/isgansiklopedisi/public_html/Services/AccessControl/classes/class.ilRoleXmlImporter.php:108#10 ilRoleXmlImporter:importSimpleXml in /home/isgansiklopedisi/public_html/Services/DidacticTemplate/classes/class.ilDidacticTemplateImport.php:170#9 ilDidacticTemplateImport:parseActions in /home/isgansiklopedisi/public_html/Services/DidacticTemplate/classes/class.ilDidacticTemplateImport.php:76#8 ilDidacticTemplateImport:import in /home/isgansiklopedisi/public_html/Services/DidacticTemplate/classes/class.ilDidacticTemplateSettingsGUI.php:248#7 ilDidacticTemplateSettingsGUI:importTemplate in /home/isgansiklopedisi/public_html/Services/DidacticTemplate/classes/class.ilDidacticTemplateSettingsGUI.php:112#6 ilDidacticTemplateSettingsGUI:executeCommand in /home/isgansiklopedisi/public_html/Services/UICore/classes/class.ilCtrl.php:203#5 ilCtrl:forwardCommand in /home/isgansiklopedisi/public_html/Services/DidacticTemplate/classes/class.ilObjObjectTemplateAdministrationGUI.php:66#4 ilObjObjectTemplateAdministrationGUI:executeCommand in /home/isgansiklopedisi/public_html/Services/UICore/classes/class.ilCtrl.php:203#3 ilCtrl:forwardCommand in /home/isgansiklopedisi/public_html/Services/Administration/classes/class.ilAdministrationGUI.php:237#2 ilAdministrationGUI:executeCommand in /home/isgansiklopedisi/public_html/Services/UICore/classes/class.ilCtrl.php:203#1 ilCtrl:forwardCommand in /home/isgansiklopedisi/public_html/Services/UICore/classes/class.ilCtrl.php:164#0 ilCtrl:callBaseClass in /home/isgansiklopedisi/public_html/ilias.php:20

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I will be very glad if you suggest me to resolve this issue.

Thanks in advance

Sinan GUL