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Your LimeSurvey version: Version 5.6.55+240220
Own server or LimeSurvey hosting: shared hosting
Survey theme/template: fruity
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This is a generic question to Limesurvey, not pdfReport plugin.

I am working with the demo survey provided by the pdfReport (link:    ) and I am running into an expression script parsing error that I cannot explain.  Details:

1) The first question in the sample survey has an email form and an expression script that doesn't generate any errors in Lime survey until I either make any change and hit save or just hit save after the question is opened.

2) Here is how to replicate the issue:

a) Create a new blank survey.

b) Import the sample question:  

c) When you import it, as long as you don't hit save everything looks fine and Lime survey visually confirms that the expression script in the question is okay.  Screenshot:  

d) Then open up the question and just hit save.  Now Limesurvey believes it cannot parse the expression script.  Screenshot:  

3) I don't understand two things:

a) Why does this error happen?  Everything looks fine when I import the question and the survey (regex) even works great on the email field when testing the survey, but as soon as I edit the question and hit save that parsing error shows up.

b) What is the proper way to fix this issue?  In the past I created a very long expression that concatenated all of the problem characters into one long expression but that doesn't seem quite right given the above behaviour.  Any suggestions?

Thanks.