Version 2.0.3 worked just fine. Updated today and now says "Invalid sketch name" on all my files.
Version: 2.0.4
Date: 2023-02-27T16:14:28.576Z
CLI Version: 0.31.0
Copyright © 2023 Arduino SA
Hi @lfdavis1786. There was a bug in Arduino IDE 2.0.3 and earlier that allowed the creation of invalid sketches. Please rename your sketch to have a valid sketch name according to the instructions the IDE provides and the error will go away.
If you have any questions or problems while doing that, please let us know and we'll help you out.
After renaming my files with no spaces in them things are working.
WELCOME BACK TO THE 1980'S.
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