Property 'on' does not exist on type 'ClipboardJS'

[mrcomptech]

Used GitHub Desktop and started with fresh copy of the SP repository.
Followed the instructions on https://github.com/johannesjo/super-productivity#running-the-development-server,
cd super-productivity
npm install
npm install -g @angular/cli

and started the server,
ng serve.

I receive this error in the PowerShell-7 console from where I executed the above commands:

ERROR in src/app/features/worklog/worklog-export/worklog-export.component.ts:213:15 - error TS2339: Property 'on' does not exist on type 'ClipboardJS'.

213 clipboard.on('success', (e: any) => {

I use Visual Studio Code to open the SP directory then opened the woklog-export.component.
Inserted a line above 213 and tried investigating the clipboard object by typing in clipboard immediately followed by a period.
but VSCode only hints :
defaultAction
defaultTarget
defaultText
destroy
listenClick
onClick
resolveOptions

There is no click.on , so the error message is correct.
Tried using clipboard.onClick but that gave the error:
ERROR in src/app/features/worklog/worklog-export/worklog-export.component.ts:213:34 - error TS2554: Expected 1 arguments, but got 2.

In Firefox when I visit http://localhost:4200/ the only thing on the page is "Cannot GET /".
Also ran: npm install ngclipboard --save
No change when restarting ng server.

Then I commented on the clipboard function lines 212 to 220 and received a bunch of errors about missing semi-colons and missing commas. So I then temporarily removed those lines and received all the same error. So I then commented out line 22:
import Clipboard from 'clipboard';
And once again received all the same error. So I undid all my changes so that file was as it was originally.

Don't know what will fix this or what to try next, help would very much be appreciated.
Thanks

UPDATE
ran
npm install clipboard --save
received errors:
172 packages are looking for funding run npm fund for details
So ran npm fund and received msg run audit fix, so ran:
npm audit fix
Audit did not fix errors.

Still at original error:
ERROR in src/app/features/worklog/worklog-export/worklog-export.component.ts:213:15 - error TS2339: Property 'on' does not exist on type 'ClipboardJS'.

[johannesjo]

Hi there! As first step I'd try using 'yarn' as package manager.

[mrcomptech]

OK, it looks like that did the trick.
The playground is now open so I'm going to go and jump on the merry-go-round !!!