[Bug 1902992] Re: upgrade from 18.04 to 20.04 stops midway"An unresolvable problem occurred while calculating the upgrade. This was likely caused by: * Unofficial software packages not provided by Ubu

Could not calculate the upgrade An unresolvable problem occurred while calculating the upgrade. This was likely caused by: * Unofficial software packages not provided by Ubuntu Please use the tool 'ppa-purge' from the ppa-purge package to remove software from a Launchpad PPA and try the

[Bug 1902992] [NEW] upgrade from 18.04 to 20.04 stops midway"An unresolvable problem occurred while calculating the upgrade. This was likely caused by: * Unofficial software packages not provided by U

Public bug reported: An unresolvable problem occurred while calculating the upgrade. This was likely caused by: * Unofficial software packages not provided by Ubuntu Please use the tool 'ppa-purge' from the ppa-purge package to remove software from a Launchpad PPA and try the upgrade again.