Err:1 download.opensuse.org/repositories/isv:/ownCloud:/server:/10/Ubuntu_18.04 InRelease The following signatures were invalid: …
FULL ERROR TEXT:
Err:1
download.opensuse.org/repositories/isv:/ownCloud:/server:/10/Ubuntu_18.04 InRelease The following signatures were invalid: EXPKEYSIG 2345JHGFD234R5T isv:ownCloud OBS Project ownCloud@build.opensuse.org> Fetched 254 kB in 1s (379 kB/s) Reading package lists… Done W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: download.opensuse.org/repositories/isv:/ownCloud:/server:/10/Ubuntu_18.04 InRelease: The following signatures were invalid: EXPKEYSIG 2345JHGFD234R5T isv:ownCloud OBS Project ownCloud@build.opensuse.org> W: Failed to fetch download.opensuse.org/repositories/isv:/ownCloud:/server:/10/Ubuntu_18.04/InRelease The following signatures were invalid: EXPKEYSIG 2345JHGFD234R5T isv:ownCloud OBS Project ownCloud@build.opensuse.org> W: Some index files failed to download. They have been ignored, or old ones used instead.
FIX:
Remove repo download.owncloud.org/download/repositories/production/Ubuntu_18.04 in owncloud.list in /etc/apt/sources.list.d/ folder. (repo is deprecated/)/
Add repo isv:ownCloud:server:10.list instead.
Ref: software.opensuse.org//download.html?project=isv%3AownCloud%3Aserver%3A10&package=owncloud-complete-files