I'm attaching the errors, they appear in version 81
ValueError: mt_rand(): Argument #2 ($max) must be greater than or equal to argument #1 ($min) in /sites/-----------------/billing/modules/servers/HetznerCloud/lib/HetznerCloud.php:179
Stack trace:
#0 /sites/------------/billing/modules/servers/HetznerCloud/lib/HetznerCloud.php(179): mt_rand(1000000000, 0)
#1 /sites/---------------/billing/modules/servers/HetznerCloud/lib/HetznerCloud.php(142): WHMCS\Module\Server\HetznerCloud\HetznerCloud::HetznerCloud_Lcheck('HetznerCloud-Ow...', '==Qf7ICOw0yMw0C...')
#2 /sites/---------------/billing/modules/addons/HetznerCloud/HetznerCloud.php(0): WHMCS\Module\Server\HetznerCloud\HetznerCloud->Get_HetznerCloudLicenseCheck()
#3 /sites/------------/billing/admin/addonmodules.php(0): HetznerCloud_output(Array)
#4 {main}