Validation Issue

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We don't know this issue. Can you show the exact whole error message?
And what version of CI4 did work?

Code:

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Type Error
str_contains(): Argument #1 ($haystack) must be of type string, int given

SYSTEMPATH\Validation\Validation.php at line 172
LINE 172:
if (str_contains($field, '*')) {
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This works in CI 4.0, number as field names still accepted.

Other bugs that I found is when I put only "trim" as validation then this will raise same error, I just want to make sure that user put something instead string with spaces, but this can be escalated by adding regex into validation for now. I read from internet trim in 4.0 was converted into boolean while 4.5.4 just null, this probably leads into validation error.