Broken menu bar and warning

Support
#1

Hello, our website https://pronkpsychology.co.uk the menu bar is gone. We installed lates version of the theme and then we get this warning:

/Unknown Error preg_replace_callback(): Compilation failed: invalid range in character class at offset 11/

If we stick to a bit older version ox X we do not have that warning but still no menu bar. Can you help us please?
Thanks,
Ronald

#2

Hello Ronald,

It looks like you have updated X to the latest version but not Cornerstone which is causing an incompatibility issue.

Please make sure to update Cornerstone as well and clear your site’s cache after.

Hope this helps.

#3

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