It should be noted that for Opera users in the meantime, you should disable the auto-update feature within Opera and manually correct the "https://" typo in /etc/apt/sources.list.d/opera-stable.list as root.
For example, from the terminal:
$ sudo pluma /etc/apt/sources.list.d/opera-stable.list
It should be noted that for Opera users in the meantime, you should disable the auto-update feature within Opera and manually correct the "https://" typo in /etc/apt/ sources. list.d/ opera-stable. list as root.
For example, from the terminal:
$ sudo pluma /etc/apt/ sources. list.d/ opera-stable. list