Java isn't installed correctly on my KDE Neon machine, and if I try to fix it using

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sudo apt-get remove openjdk-11-jdk

or

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sudo apt purge

, either or gives me this error. I've tried moving a openjdk11.0.16 file to /var/cache/oracle-jdk11-installer-local, but I got the same output, and I do not know what to do.

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Building dependency tree       
Reading state information... Done
Package 'openjdk-11-jdk' is not installed, so not removed
Starting pkgProblemResolver with broken count: 0
Starting 2 pkgProblemResolver with broken count: 0
Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
3 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up oracle-java11-installer-local (11.0.13-1~linuxuprising0) ...
Before installing this package,
please download the Oracle JDK 11 .tar.gz file
with the same version as this package (version 11.0.4),
and place it in /var/cache/oracle-jdk11-installer-local,

E.g.:
sudo mkdir -p /var/cache/oracle-jdk11-installer-local
sudo cp jdk-11.0.4_linux-x64_bin.tar.gz /var/cache/oracle-jdk11-installer-local/
sha256sum mismatch jdk-11.0.13_linux-x64_bin.tar.gz
Oracle JDK 11 is NOT installed.
dpkg: error processing package oracle-java11-installer-local (--configure):
 installed oracle-java11-installer-local package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of default-jre:
 default-jre depends on openjdk-11-jre; however:
  Package openjdk-11-jre is not installed.
  Package oracle-java11-installer-local which provides openjdk-11-jre is not configured yet.

dpkg: error processing package default-jre (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of minecraft-launcher:
 minecraft-launcher depends on default-jre; however:
  Package default-jre is not configured yet.
  Package oracle-java11-installer-local which provides default-jre is not configured yet.

dpkg: error processing package minecraft-launcher (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 oracle-java11-installer-local
 default-jre
 minecraft-launcher
E: Sub-process /usr/bin/dpkg returned an error code (1)