Change WordPress user roles and capabilities › Forums › Bug Reports › Custom Roles timing out when Per Form Access is enabled › Reply To: Custom Roles timing out when Per Form Access is enabled
Repeat the action which leat to request timeout and look for the latest records at:
Is it suitable for this case to export database, plugins and theme files using “UpdraftPlus” plugin and share with me (support [at-sign] role-editor.com) via DropBox or Google Drive?
I would setup your site copy at my local dev. environment and test the issue with debugger then.