Update Failed in clean debian OS

Install / Update Setup
1

Screenshot%20from%202018-11-21%2015-39-45%20(copy)
Screenshot%20from%202018-11-21%2015-39-45%20(copy)1360×768 79.3 KB

After I made an update for Debian 9.5 this error showed up

  1. is it a big problem?
  2. if yes, how to fix it?

thank you in advance