Error codes for the TYPO3 extension form, table created by @ErHaWeb and shown in his Video https://www.youtube.com/watch?v=1wWn_xF_WVI

Form-Message-Codes.md

Validator	Code	Message	Supported by Fieldtypes	Matching JavaScript Validity State
NotEmpty	1221560910	The given subject was NULL	all
NotEmpty	1221560718	The given subject was empty (string).	all	valueMissing
NotEmpty	1347992400	The given subject was empty (array).	all
NotEmpty	1347992453	The given subject was empty (object).	all
Alphanumeric	1221551320	The given subject was not a valid alphanumeric string.	Text, Textarea, Password, AdvancedPassword	typeMismatch
Stringlength	1238110957	The given object could not be converted to a string.	Text, Textarea, Password, AdvancedPassword
Stringlength	1269883975	The given value was not a valid string.	Text, Textarea, Password, AdvancedPassword	typeMismatch
Stringlength	1428504122	The length of the given string was not between %s and %s characters.	Text, Textarea, Password, AdvancedPassword
Stringlength	1238108068	The length of the given string is less than %s characters.	Text, Textarea, Password, AdvancedPassword	tooShort
StringLength	1238108069	The length of the given string exceeded %s characters.	Text, Textarea, Password, AdvancedPassword	tooLong
EmailAddress	1221559976	The given subject was not a valid email address.	Text, Password, Email*, AdvancedPassword	typeMismatch
Integer	1221560494	The given subject was not a valid integer.	Text, Textarea, Password, AdvancedPassword	typeMismatch
Float	1221560288	The given subject was not a valid float.	Text, Textarea, Password, AdvancedPassword	typeMismatch
NumberRange	1221563685	The given subject was not a valid number.	Text, Textarea, Password, AdvancedPassword	typeMismatch
NumberRange	1221561046	The given subject was not in the valid range (%s - %s).	Text, Textarea, Password, AdvancedPassword	rangeUnderflow, rangeOverflow
RegularExpression	1221565130	The given subject did not match the pattern.	Text, Textarea, Password, Telephone, Url, AdvancedPassword	patternMismatch
Number	1221560288	The given subject was not a valid number.	Number*	typeMismatch
DateRange	1521293685	You must enter an instance of \DateTime.	Date
DateRange	1521293686	You must select a date before %s.	Date
DateRange	1521293687	You must select a date after %s Date.	Date
DateTime	1238087674	The given subject was not a valid DateTime. Got: '%s".	DatePicker
Count	1475002976	You must enter a countable subject.	Multicheckbox, MultiSelect
Count	1475002994	You must select between %s to %s elements.	Multicheckbox, MultiSelect
FileSize	1505303626	You must enter an instance of \TYPO3\CMS\Extbase\Domain\Model\FileReference.	FileUpload, ImageUpload
FileSize	1505305752	You must select a file that is larger than %s in size.	FileUpload, ImageUpload
FileSize	1505305753	You must select a file that is no larger than %s.	FileUpload, ImageUpload
Text	1221565786	The given subject was not a valid text (e.g. contained XML tags).	Text, Textarea, Password, AdvancedPassword	typeMismatch