The newly installed Ubuntu18 will report an error every time it boots, as shown in the figure below:

A search revealed this:
https://wiki.ubuntu.com/Apport
This information can be used by developers to catch bugs in certain aspects of the system and make improvements.
This is the function of Apport. If you have any questions, please report them to the developer for reference. It should be a good thing, but for the novice, there is no psychological preparation in advance, and the frequency of occurrence is too frequent, which often affects the operation of the program.
I’m so bored, so I’m going to turn it off for the time being
so /etc/defaul/apport
which is enabled=1
instead of enabled=0
it’s going to shut up
but if there’s a problem no one is going to tell you so please make your own choice

supplement
new version installation problems are more
as improvements and updates become less and less problems