dlopen(): error loading libfuse.so.2
AppImages require FUSE to run.
You will get the above error message if you are using a fresh install of Ubuntu 23.04 or later. If you upgrade from an older version of Ubuntu, the AppImage will work without any problem. Ubuntu comes with a newer version of FUSE (Filesystem in UserSpace) (FUSE 3). However, most AppImages require the older FUSE 2 version to run.
Enable AppImage Support in Ubuntu
Install FUSE 2 On Ubuntu
Open the terminal application using the ctrl+alt+t keys and run the below command.
sudo apt install libfuse2
It will install the FUSE 2 on your system and now you can run any AppImage portable file.