I checked my servers now for your errors and found all entries except of the “NT_STATUS_INTERNAL_ERROR” ones. The other entries are “one-timers”, related to other things and not relevant in this case I think.
So this may be the really bad one:
NT_STATUS_INTERNAL_ERROR at /usr/share/perl5/vendor_perl/NethServer/LdapClient.pm line 126.
@Andy_Wismer has exactly the same error, both servers have in common that they are VMs:
Maybe perl related?
You may try:
Updating to actual kernel and update the DC container
Change IP of container
Reinstall AD
Backup/recovery procedure
Here is another thread of the same problem, just to summarize: