Joomla 3.9.0; PHP 7.0.32; BreezingForms Pro; Fully Updated.
Installed per pdf and selected the link in "Overview" to obtain and install latest version of Gantry v 4.1.29. Entered "Style" and non of the dropdown menus are populated. Selected a logo and saved. Enter "Assignments" and toggle "All" and saved changes. I performed the previous several times without any change. I got a message indicated the changes were saved successfully each time. Clicked on the site title in the upper right corner and there were no changes on the template. When I re-enter the <Template><Style><Worldbiz><Style>, there was no template image and the page assignment were unselected.
Uninstalled the template and obtained latest version of "Gantry" v 5.4.26 and reinstalled the Worldbiz template and got the same results. I disabled Gantry 4.1.29 and got the following when selecting Worldbiz (see attachment).
When I select the template "Prostar" shipped with Joomla, everything saves appropriately (see attach 2)
What am I doing wrong? Apologies for being so wordy!
Please install gantry from this link : crosstec.org/gantry.zip
(you might need to update it to v4.1.33)
Afterwards make a change > delete the Joomla / Gantry Cache and let me know if the changes are visible in the frontend ?
When I set your image to 450px x 450px it's showed correct :