Re: Error reading Error reading environment data (16) by Kurbon Rakhmanov - Thursday, 14 February 2019, 12:22 PM Number of replies: 0 I must correct all level="required" to level="optional"environment.xmlI have version Moodle 2.9, PHP5.640-1, Ubuntu 16.04+deb. Apache 2.4.18 environment.xml Average of ratings: - Permalink Show parent Reply