Minikube dashboard is not working on Ubuntu 18.04 LTS

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Cluster information:

Kubernetes version: 1.16.2
Cloud being used: Digital Ocean
Installation method:
Host OS: Ubuntu 18.04 LTS
CNI and version:
CRI and version:

:thinking: Verifying dashboard health …
:rocket: Launching proxy …
:thinking: Verifying proxy health …
:tada: Opening in your default browser…
/usr/bin/xdg-open: 851: /usr/bin/xdg-open: www-browser: not found
/usr/bin/xdg-open: 851: /usr/bin/xdg-open: links2: not found
/usr/bin/xdg-open: 851: /usr/bin/xdg-open: elinks: not found
/usr/bin/xdg-open: 851: /usr/bin/xdg-open: links: not found
/usr/bin/xdg-open: 851: /usr/bin/xdg-open: lynx: not found
/usr/bin/xdg-open: 851: /usr/bin/xdg-open: w3m: not found
xdg-open: no method available for opening ‘
:bomb: failed to open browser: exit status 3

Same problem when I try to run any container which has dashboard like Linkr.

When I installed packages either of above packakages i.e link2 , elinks or links and try to run dashboard, I’m getting following error.

ERROR: event_add failed: Operation not permitted at …/select.c:361, handle 0
[warn] Epoll ADD(1) on fd 0 failed. Old events were 0; read change was 1 (add); write change was 0 (none); close change was 0 (none): Operation not permitted

ERROR: event_add failed: Operation not permitted at …/select.c:361, handle 0

Can you suggest any work around to resolve this error.