Cloud Platform

Asalam Alaikum (Greetings to reader)!
I am having issue while trying Groovy Validation in DOR for validate Email Address. I also done some R&D, and found multiple threads regarding this are:

1. https://docs.oracle.com/en/cloud/saas/sales/22a/oasal/groovy-support-for-email-address-format-validation.html#s20073309
2. https://docs.oracle.com/en/cloud/saas/applications-common/21d/oacex/groovy-scripts.html (Section: Adding Validations to Fields)
3. https://blogs.oracle.com/fadevrel/post/common-regular-expression-patterns
   But its still providing error when it comes to save DOR. Also tried multiple REGEX validation, which works on groovy console, but not in DOR.
   -------------------------------------------------------------
   ^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$
   ([a-z]+(\.)?[a-z0-9]+)@([a-z]+)\.{1}([a-z]{2,8})
   /^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2}))$/
   /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,4}$/
   ------
   def emailStr = "someone@someplace.com"
   def regexStr = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,4}$/
   if (emailStr.matches(regexStr)){
   // If we arrive here then the emailStr is a correctly formatted email string
   } else {
   // If we arrive here then the email address is not correctly formatted and needs to be handled somehow.
   }
   ------
   ([a-zA-Z]+)(\.)?(_)?([a-zA-Z0-9]+)\@{1}([a-zA-Z]+)\.([a-zA-Z0-9]){2,8}
   [a-zA-Z0-9]+\@[a-zA-Z0-9]+\.[a-zA-Z0-9]{2,4}
   /[_A-Za-z0-9-]+(\.[_A-Za-z0-9-]+)*@[A-Za-z0-9]+(\.[A-Za-z0-9]+)*(\.[A-Za-z]{2,})/
   ------
   def emailStr = "someone@someplace.com"
   def regexStr = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,4}$/
   if (emailStr.matches(regexStr)){
   return true
   }
   ------
   /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,4}$/
   FlexSeg?.companyEmailAdd.toString() == null || FlexSeg?.companyEmailAdd.toString() ==~ /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,4}$/
   -------------------------------------------------------------
   These regex are validating on groovy console, but not with application. Can any one suggest anything I can do to resolve this issue.
   Thank you,
   Regards,