I have a simular bug andmaybe i found a workaround.
1. start the update-manager with sudo update-manager and wait until it crash
2. kopie the prerequists-sources.list from /tmp/NAMECALLEDINCONSOLE into /etc/apt/sources.list.d/ as prerequists-sources.list
3. delete the {archiv} part from this file
4. start the update-manager
I have a simular bug andmaybe i found a workaround.
1. start the update-manager with sudo update-manager and wait until it crash sources. list from /tmp/NAMECALLED INCONSOLE into /etc/apt/ sources. list.d/ as prerequists- sources. list
2. kopie the prerequists-
3. delete the {archiv} part from this file
4. start the update-manager