Designer [1.9.1****]: No more handles

Problem

Opening the Lycia Studio form designer on Fedora OS results in the subject mentioned error. Below information can be found in the Lycia log file:

org.eclipse.swt.SWTError: No more handles

at org.eclipse.swt.SWT.error(SWT.java:4559)
at org.eclipse.swt.SWT.error(SWT.java:4448)
at org.eclipse.swt.SWT.error(SWT.java:4419)

...

Solution

To solve the problem please execute the following command in your console:

export SWT_GTK3=0