Google teachable Machine 2 is throwing errors on training [on hold]

I couldnt find a good tag for this and I’m sorry if I am in the wrong forum.
When I try to train a simple model with 2 classes, I get the following error in the console:

 index.bundle.js:2 Uncaught (in promise) Error: numFrames (43) exceeds the minimum numFrames (21) among the examples of the Dataset.
    at Object.S [as assert] (index.bundle.js:2)
    at t.getData (index.bundle.js:104)
    at e.collectTransferDataAsTensors (index.bundle.js:104)
    at e. (index.bundle.js:104)
    at index.bundle.js:104
    at (index.bundle.js:104)
    at index.bundle.js:104
    at new Promise ()
    at s (index.bundle.js:104)
    at e.trainOnTensors (index.bundle.js:104)