GUI: crash on start fitting under Qt6

After the transition to Qt6 minimization in GUI stopped working.

1. Create sample, instrument.
2. Load data (1D or 2D)
3. Create add fitting parameter
4. Press "Run" button on "Fitting panel" --> CRASH

Under qt5 minimization works. So the qt version is the only difference.

Message in Debug mode:

info from gdb:

Text output: gdb_info