upgrade to 20.04 failed

[LMH1]

I have issue:

An unresolvable problem occurred while calculating the upgrade. 

This was caused by: 
* Upgrading to a pre-release version of Ubuntu 
This is most likely a transient problem, 
please try again later. 
If none of this applies, then please report this bug using the 
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If 
you want to investigate this yourself the log files in 
'/var/log/dist-upgrade' will contain details about the upgrade. 
Specifically, look at 'main.log' and 'apt.log'.

https://paste.ubuntu.com/p/tqQxfVW7Vc/

[slickymaster]

Thread moved to Ubuntu Development Version.

[LMH1]

But why is not possible to upload txt files as attackment?

[slickymaster]

But why is not possible to upload txt files as attackment?

You mean, here in the thread?

You can, just use the attachment functionality provided by the paperclip button above the text entry box.

If you're trying to post more than 50KB of text please use https://paste.ubuntu.com/ and put the link in your forum post.

[LMH1]

but why so poor forum?

I find out issue: xubutu desktop is issue.