new project, click on DF button, crash

iMolpro version 2025.4.3 on openSUSE15.6

New project: **bla6**

build/load **H2O** from database

click on `Density fitting` , crash

```
Traceback (most recent call last):
  File "ProjectWindow.py", line 1456, in <lambda>
  File "ProjectWindow.py", line 1602, in input_specification_change
AttributeError: 'bool' object has no attribute 'isdigit'
Aborted (core dumped)

```