I get this error. The only search result I found related to Twig, but just reporting it in case anyone else is suffering the same issue.
An exception has been thrown during the compilation of a template ("Unparenthesized `a ? b : c ? d : e` is deprecated. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)`") in "@gantry-admin/pages/configurations/styles/styles.html.twig".
Your subscription appears to have expired. Support does require a current subscription.
Please would you post your URL, superuser id and pswd in the secure tab of your post and I'll have a look for you.
Regards, Mark.
Please search forums before posting. Please make sure your post includes the version of the CMS you are using and a link to the problem. Annotations on screenshots can also be helpful to explain problems/goals. Please use the "secure" tab for confidential information.