Edit case data bug

[paolabfor]

When is selected the Edit case data tool, appears the follow error message:

TypeError: arguments did not match any overloaded call: fromString(str, format: Qt.DateFormat = Qt.TextDate): argument 1 has unexpected type 'QVariant' fromString(str, str): argument 1 has unexpected type 'QVariant'
Traceback (most recent call last):
File "C:/Users/bonatop/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\VetEpiGIS-Tool\vetepigis_tool.py", line 1086, in featEdit
qd = QDate.fromString(s, f)
TypeError: arguments did not match any overloaded call:
fromString(str, format: Qt.DateFormat = Qt.TextDate): argument 1 has unexpected type 'QVariant'
fromString(str, str): argument 1 has unexpected type 'QVariant'