Thank you very much for the details!
I've logged in via FTP to debug through the plugin code to see where the issue is. It looks like that the internal WordPress wp_mkdir_p() function was not working correctly and timed out for some reason. I have placed a back-up code to the affected file, now it activated without issues.
I will make sure to include this fix in the upcoming release, to prevent this unpredictable problem.Best,
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