If this template helps then use it. If not then just delete and start from scratch.
OS (e.g. Win10): Ubuntu 20.04 LTS
PsychoPy version (e.g. 1.84.x): 2021.2.3
Standard Standalone? (y/n) If not then what?: virtual environment as suggested here Installation headaches and (partly) fixes on Ubuntu 20.04
NOTE: I didn’t go with Jonathan’s suggestion of installing a VM. There should be something easier than installing a whole VM. My Psychopy btw looks as glitchy Arboc described in that thread.
What are you trying to achieve?: Copy a component from one routine and paste it into another. Or even paste it into the same routine.
What did you try to make it work?: I right-clicked the component in the builder view and then chose the tab of the routine where I wanted to paste it. Neither pressing Ctrl+V nor clicking Edit → Paste actually pasted the component. Nothing happens.
What specifically went wrong when you tried that?: Neither pressing Ctrl+V nor clicking Edit → Paste actually pasted the component. Nothing happens. There is no error message either.
Include pasted full error message if possible. “That didn’t work” is not enough information.