Failed to load Twig template "_includes/field", index "764771142": cache is corrupted
Additional info: This error occurs only when devMode=true

Restricting image upload to a single folder {owner.filmtitle|kebab} possibly caused the error, replacing the folder template helped: 

{% if owner.filmtitle %}{owner.filmtitle|kebab}{%else%}default{%endif%}


Nevertheless i don't understand why the former version caused the error, and the error message is very misleading.