fix: Add try catch wrapper for atob

Created by: leoendless

Signed-off-by: leoliu leoliu@yunify.com

What type of PR is this?

/kind bug

What this PR does / why we need it:

Fix atob throw error in secret page.

Which issue(s) this PR fixes:

Fixes #

Special notes for reviewers:

Additional documentation, usage docs, etc.: