@Sebastian-Roth There were still some duplicated MACs on my network removed then from the database and it worked, this issue was caused by myself, there were some pending macs to aprove and I didn’t paid attention to then and approved then all, but lots of them were from Virtual machines.

Hello, I came to this topic because I was having this same issue with some new Dell computers that arrived here where I work, in my case I didn’t needed to repair the grub, but I could solve this by changing some bios configuration where there’s a option to add uefi boot option and there appears the .efi file of the grub and mark it to boot first. Hope it helps!

@Sebastian-Roth There were still some duplicated MACs on my network removed then from the database and it worked, this issue was caused by myself, there were some pending macs to aprove and I didn’t paid attention to then and approved then all, but lots of them were from Virtual machines.

@Sebastian-Roth Thx a lot, it worked!

@Sebastian-Roth Hello, thx for replying, I removed some MACs using web interface, but im not sure if i checkd the database the right way.

 mysql -D fog
MariaDB [fog]> SELECT hmHostID FROM hostMAC where hmMAC IN ('b8:70:f4:c3:4d:7f','e0:ca:94:1e:3a:7e','b4:74:9f:96:6a:e7');
Empty set (0.00 sec)

Got this result, but im still getting the same error:

[Thu Dec 12 17:05:59.208393 2019] [proxy_fcgi:error] [pid 802] [client 10.2.32.179:51301] AH01071: Got error 'PHP message: PHP Fatal error:  Uncaught Exception: Error multiple hosts returned for list of mac addresses in /var/www/fog/lib/fog/hostmanager.class.php:209\nStack trace:\n#0 /var/www/fog/lib/fog/fogbase.class.php(571): HostManager->getHostByMacAddresses(Array)\n#1 /var/www/fog/lib/client/registerclient.class.php(46): FOGBase::getHostItem(true, false, false, true)\n#2 /var/www/fog/lib/fog/fogpage.class.php(3013): RegisterClient->json()\n#3 /var/www/fog/lib/fog/fogpage.class.php(249): FOGPage->requestClientInfo()\n#4 /var/www/fog/lib/pages/dashboardpage.class.php(76): FOGPage->__construct('Dashboard')\n#5 /var/www/fog/lib/fog/loadglobals.class.php(67): DashboardPage->__construct()\n#6 /var/www/fog/lib/fog/loadglobals.class.php(81): LoadGlobals::_init()\n#7 /var/www/fog/commons/base.inc.php(49): LoadGlobals->__construct()\n#8 /var/www/fog/management/index.php(22): require('/var/www/fog/co...')\n#9 {main}\n  thrown in /var/www/fog/lib/fog/hostmanager.class.php on line 209\n'

Theres something else I should do?

@Daniel-Miller Its not showing in logviewer, but got then directly from the server, the apache section say its “Unable to open file for reading”, not sure if its related to the main problem. Thx for the help.

php7.0-fpm.log
error.log

This is from a single machine, but none of then are working.
fog.log

Hello Im using debian as a server with version 1.5.7 and client 0.11.16, we were using it for about 6 months and its was working fine, but suddenly the snapins stoped working, it just stay in queue status and never starts. I tryed to reset data encryption and delete Token.dat from a few computers but its still not working…