[FIX] Catch syntax error of Regex Guide to avoid crash

[du00cs]

Motivation

Invalid regex will lead to an immediate server exit now.

(please ignore the first error catch)

Modifications

Catch InvalidSyntax error of interegular, and set the regex guide and jump forward to None.

Checklist

• Format your code according to the Contributor Guide.
• Add unit tests as outlined in the Contributor Guide.
• Update documentation as needed, including docstrings or example tutorials.