I am trying to upgrade to Mint 22 using mintupgrade but I am receiving the error code 100. I don't know what information would be helpful, so here's a screenshot.
Just in case you are trying to update from Linux Mint 21.3 to Linux Mint 22......the instructions in the below link are from the official source. Follow them closely.
It's always better to do a clean install because things could go wrong and then it's too late. My main SSD has Cinnamon 21.1 running and my other SSD has Cinnamon 22.1 which I installed some time ago. When you download the Mint ISO always run the checksum before you install...this is a must.