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Alright. I started again from scratch. Wiped my server clean by deleting all files and directories.
First I checked if my server is Magento-compatible (according to magento-check.php it is). Then I followed the installation guide for the installer version of Magento. However, I can’t get Magento installed because when I click “Start the download process” I get the exact same error mentioned above. (The only way I was able to run Magento before was by doing a full installation version).
I’m at a loss. Tried file/directory permissions 777, 775, and 755. Nothing solves the problem. Can anyone help?
I’ve contacted my host and was assured that the server fulfills the system requirements. I’ve set all the directories permission to 777 but I still cannot install Magento using the “downloader” version. (I can upload all the files from the “full package” installation and get Magento running, but then I still get the same error trying to install extensions.)
Any more ideas about what could be wrong?
Is there a way to manually install extensions without going through the MagentoConnect Manager in the backend?