https://prnt.sc/DQ-D9Pes0tTq
I tried to access a file via the 'Templates: Edit Style' tool in my attempt to add a logo style to the masthead/menu
I selected the template and then the 'template options' button, but was greeted with a 500 error, I followed the guidance as advised in the attached image (error 500-first), however, this resulted in the following error message:
"Attempted to call an undefined method named "sanitizeAssetsForJ5" of class "PlgSystemHelixultimate"."
I have upgraded to Joomla 5
All extensions are up-to-date
Please advise how I should recover from this!