No World View tab

[marpet]

Either you have disabled the Nasa World Wind in the past our something went wrong during the last update.

Have you done something of what I wrote here:

How to uninstall SNAP 6.0 manually on Linux?

You should find an uninstall script in the bin folder of the SNAP installation directory. During the uninstall process to remove all SNAP related data. The World Wind View causes sometimes trouble on Linux, especially in VMs. This is often caused by the 3D graphics card driver. Updating the driver might help and if you are in a VM it might help to enable 3D support. You can try to switch the World Wind View in to the flat mode. This can be done in the options panel in the World Wind tab of the…

Do you have the file org-esa-snap-snap-worldwind.jar in your installation directory?

Waht might help is to remove recent updates and and install the updates again.
If described it here:

Activation failed: Not all requested modules can be enabled

Probably Something went wrong during the update process. Maybe the download was interrupted or something like this. If you are on Windows type in the filesystem explorer %appdata%/SNAP, on Linux and Mac you can go to <USER_HOME>/.snap/system and delete the modules folder. Afterwards, start SNAP again and try to update it again.