I have the same problem. I would use canonical livepatch, but I get this error also.
Syslogentry:
Aug 11 07:25:15 h2744217 kernel: [47190.238359] audit: type=1400 audit(1533965115.540:93): apparmor="DENIED" operation="ptrace" profile="/snap/core/5145/usr/lib/snapd/snap-confine" pid=30532 comm="snap-confine" requested_mask="read" denied_mask="read" peer="unconfined"
Kernel: 4.18.0-041800rc7-generic
I have the same problem. I would use canonical livepatch, but I get this error also.
Syslogentry:
Aug 11 07:25:15 h2744217 kernel: [47190.238359] audit: type=1400 audit(153396511 5.540:93) : apparmor="DENIED" operation="ptrace" profile= "/snap/ core/5145/ usr/lib/ snapd/snap- confine" pid=30532 comm="snap-confine" requested_ mask="read" denied_mask="read" peer="unconfined"
Kernel: 4.18.0- 041800rc7- generic