Did you import the TEF?
Easiest thing is
Goto https://tools.developer.homey.app/tools/app-settings on your browser.
Then to Device Capabilities.
Then click on Import:

[TEF:FLOWS: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]
Paste the TEF and press Read Flows.
After that, you will get this list:
The left side shows my devices.
The right selectionboxes show with which of your devices to replace mine in the flow.
So, you need to select each of your own device, like in the image above.
And select the correct user.
After this, press Update text and run the script.
Now the flows should contain your TTS cards again.
