MySQL query failed: MySQL server has gone away
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0: /usr/local/psa/admin/plib/common_func.php3:216
db_query(string 'SELECT id, type, url, priority, enabled, auth_required, login, password FROM ai_vendor_sources')
1: /usr/local/psa/admin/plib/autoinstaller/AutoInstallerVendorSource.php:136
AutoInstallerVendorSource::getVendorSources()
2: /usr/local/psa/admin/plib/autoinstaller/AutoInstallerManager.php:209
AutoInstallerManager->install(string 'PLESK_8_2_1', array, boolean false, string '[email protected]', boolean true)
3: /usr/local/psa/admin/htdocs/server/autoinstaller_install.php:101