Snap build fails to find required plugin

[Lin-Buo-Ren]

Refer the following reply for more info:

Desktop-qt5 can not be used for remote part based on core18

It is considered that the remote part feature will be superseded by the new extensions framework, unfortunately currently there’s no extension is implemented for Qt5 applications, yet. As of now you need to define the desktop-qt5 part locally, here’s an example of snapping a Qt5 application with core18 base: