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I recently installed WSL on Windows 10 (Ubuntu), replaced the repos with Linux Mint's repositories, and installed a few GUI applications. After starting Xming (X11 server) and executing the following lines:

export DISPLAY=:0.0 #use Xming
export GIGACAGE_ENABLED=no #prevent "could not use gigacage" errors

Most graphical applications, such as Synaptic, Nemo (file manager), and Xed (text editor) launch just fine, However, mintinstall crashes with the following output:

Detected system architecture: 'x86_64' (using 'x86_64')
Traceback (most recent call last):
File "/usr/lib/linuxmint/mintinstall/mintinstall.py", line 2034, in <module>
  app = Application()
File "/usr/lib/linuxmint/mintinstall/mintinstall.py", line 59, in wrapper
  res = func(*arg)
File "/usr/lib/linuxmint/mintinstall/mintinstall.py", line 589, in __init__
  self.load_cache()
File "/usr/lib/linuxmint/mintinstall/mintinstall.py", line 59, in wrapper
  res = func(*arg)
File "/usr/lib/linuxmint/mintinstall/mintinstall.py", line 551, in load_cache
  self.flatpak_installation = Flatpak.Installation.new_system()
GLib.Error: g-io-error-quark: mkdirat: Permission denied (14)  

I used the command sudo apt remove mintinstall and sudo apt install mintinstall to try and fix it, but got this from dpkg:

error: Failed to open file '/proc/sys/kernel/random/boot_id': No such file or directory
dpkg: error processing package mintinstall (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 mintinstall
E: Sub-process /usr/bin/dpkg returned an error code (1)

If I try to create the file /proc/sys/kernel/random/boot_id, I get a Permission denied error, even as su.

How do I fix this (launch mintinstall)?

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