I recently started getting a 500 error, but **only when trying to edit templates**. Editing pages created in Oxygen Builder works fine.
The only thing that seems to fix the problem is disabling the Toolset Types plugin, which I use for custom post types and custom fields. I have Oxygen Builder (3.8.1) and Toolset Types (v 3.4.10) installed.
Any other Toolset users experiencing a similar issue?