After install Cuda 11.8 ,The system cannot install other software,dependencies have problem

i want to install sunloginclient(a remot control client),i do the things and happen next,i do not know how to solve it.happen the worse question.ask for help ,thansk for you!
i already installed cuda11.8 and it can run normal,and the stable diffusion web ui can work.
this is install sunlogin.my system is Ubuntu 20.04 LTS.if you need more information about it to solve ,i can give you latter.

base) gxzy@pod-ssh-256:~/downloads$ ls
SunloginClient_15.2.0.63062_amd64.deb  sunloginclientshell-10.1.1.28779-amd64.deb
(base) gxzy@pod-ssh-256:~/downloads$ sudo dpkg -i sunloginclientshell-10.1.1.28779-amd64.deb            
(Reading database ... 71372 files and directories currently installed.)
Preparing to unpack sunloginclientshell-10.1.1.28779-amd64.deb ...
Unpacking sunloginclient (10.1.1.28779) over (10.1.1.28779) ...
dpkg: dependency problems prevent configuration of sunloginclient:
 sunloginclient depends on libncurses5; however:
  Package libncurses5:amd64 is not configured yet.

dpkg: error processing package sunloginclient (--install):
 dependency problems - leaving unconfigured
Processing triggers for mime-support (3.64ubuntu1) ...
Errors were encountered while processing:
 sunloginclient

then

(base) gxzy@pod-ssh-256:~/downloads$ sudo apt install libncurses5
Reading package lists... Done
Building dependency tree       
Reading state information... Done
libncurses5 is already the newest version (6.2-0ubuntu2.1).
libncurses5 set to manually installed.
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 cuda-drivers-525 : Depends: nvidia-compute-utils-525 (>= 525.60.13) but it is not going to be installed
                    Depends: nvidia-utils-525 (>= 525.60.13) but it is not going to be installed
 nvidia-driver-525 : Depends: nvidia-compute-utils-525 (= 525.60.13-0ubuntu1) but it is not going to be installed
                     Depends: nvidia-utils-525 (= 525.60.13-0ubuntu1) but it is not going to be installed
                     Recommends: nvidia-prime (>= 0.8) but it is not going to be installed
                     Recommends: libnvidia-compute-525:i386 (= 525.60.13-0ubuntu1)
                     Recommends: libnvidia-decode-525:i386 (= 525.60.13-0ubuntu1)
                     Recommends: libnvidia-encode-525:i386 (= 525.60.13-0ubuntu1)
                     Recommends: libnvidia-fbc1-525:i386 (= 525.60.13-0ubuntu1)
                     Recommends: libnvidia-gl-525:i386 (= 525.60.13-0ubuntu1)
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

and then

(base) gxzy@pod-ssh-256:~/downloads$ sudo apt --fix-broken install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following packages were automatically installed and are no longer required:
  gconf-service gconf-service-backend gconf2-common libappindicator3-1 libgconf-2-4
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
  nvidia-compute-utils-525 nvidia-utils-525
The following NEW packages will be installed:
  nvidia-compute-utils-525 nvidia-utils-525
0 upgraded, 2 newly installed, 0 to remove and 207 not upgraded.
110 not fully installed or removed.
Need to get 0 B/633 kB of archives.
After this operation, 2021 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 file:/var/cuda-repo-ubuntu2004-12-0-local  nvidia-compute-utils-525 525.60.13-0ubuntu1 [276 kB]
Err:1 file:/var/cuda-repo-ubuntu2004-12-0-local  nvidia-compute-utils-525 525.60.13-0ubuntu1
  File not found - /var/cuda-repo-ubuntu2004-12-0-local/./nvidia-compute-utils-525_525.60.13-0ubuntu1_amd64.deb (2: No such file or directory)
Get:2 file:/var/cuda-repo-ubuntu2004-12-0-local  nvidia-utils-525 525.60.13-0ubuntu1 [356 kB]
Err:2 file:/var/cuda-repo-ubuntu2004-12-0-local  nvidia-utils-525 525.60.13-0ubuntu1
  File not found - /var/cuda-repo-ubuntu2004-12-0-local/./nvidia-utils-525_525.60.13-0ubuntu1_amd64.deb (2: No such file or directory)
E: Failed to fetch file:/var/cuda-repo-ubuntu2004-12-0-local/./nvidia-compute-utils-525_525.60.13-0ubuntu1_amd64.deb  File not found - /var/cuda-repo-ubuntu2004-12-0-local/./nvidia-compute-utils-525_525.60.13-0ubuntu1_amd64.deb (2: No such file or directory)
E: Failed to fetch file:/var/cuda-repo-ubuntu2004-12-0-local/./nvidia-utils-525_525.60.13-0ubuntu1_amd64.deb  File not found - /var/cuda-repo-ubuntu2004-12-0-local/./nvidia-utils-525_525.60.13-0ubuntu1_amd64.deb (2: No such file or directory)
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

then
this is apt update

base) gxzy@pod-ssh-256:~/downloads$ sudo apt update
Get:1 file:/var/cuda-repo-ubuntu2004-12-0-local  InRelease
Ign:1 file:/var/cuda-repo-ubuntu2004-12-0-local  InRelease
Get:2 file:/var/cuda-repo-ubuntu2004-12-0-local  Release            
Err:2 file:/var/cuda-repo-ubuntu2004-12-0-local  Release                            
  File not found - /var/cuda-repo-ubuntu2004-12-0-local/Release (2: No such file or directory)
Hit:3 https://dl.google.com/linux/chrome/deb stable InRelease                       
Hit:4 http://security.ubuntu.com/ubuntu focal-security InRelease                                         
Get:5 http://mirrors.ubuntu.com/mirrors.txt Mirrorlist [846 B]
Hit:7 http://mirrors.cqu.edu.cn/ubuntu focal-updates InRelease
Hit:6 https://mirrors.cloud.tencent.com/ubuntu focal InRelease                                           
Hit:8 https://mirrors.jlu.edu.cn/ubuntu focal-backports InRelease                                        
Reading package lists... Done
E: The repository 'file:/var/cuda-repo-ubuntu2004-12-0-local  Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.