Hi there!
Sorry for the late response.
Which update you are indicating, please? The Helix Ultimate system plugin?
Actually, system plugin update is not recommended for now if there is not a template update available yet. We have recently updated our 11 templates with compatibility. They are :
https://www.joomshaper.com/blog/11-joomla-templates-updated-with-joomla-4
As you can see Wayne Corp Template is not among them, so kindly roll back to the last working backup of your site for now. No worries, there will be updates soon as we have planed to update our all products with compatibility of Joomla 4 too! Here is the plan:
https://www.joomshaper.com/blog/joomshaper-s-plans-for-joomla-4
I could have given you custom CSS to get back your previous look of site, but it may be inconvenient to do so by hand.
Best Regards