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WHMCS\Exception\Application\InstallationVersionMisMatch: Database version '8.11.2-release.1' does not match file version '8.13.1-release.1' in /home/myihttpco/public_html/vendor/whmcs/whmcs-foundation/lib/Application/ApplicationServiceProvider.php:0
Stack trace:
#0 /home/myihttpco/public_html/init.php(0): WHMCS\Application\ApplicationServiceProvider::checkVersion()
#1 /home/myihttpco/public_html/aff.php(19): require('/home/myihttpco...')
#2 {main}