yes same error here, change the line to this to fix it:
const buttonEntries = jQuery('button', form.$form).map((key, entry) => [entry.name, entry.value]);
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This reply was modified 10 months, 2 weeks ago by Felix Ender.
@pixelive no i installed an older Version (5.6.2) and that is still running since then.
I hope this will be fixed before something else is not compatible with the old Version anymore.
Seams to be an error in version 5.6.3
Installed 5.6.2 and the error is gone
