No such file or directory: ".current_index_Namespace(path_timestamps='tools/DatasetViewer/timestamps.json', root_path='STF/SeeingThroughFogCompressedExtracted', username='admin', view_only=False)"

[RhythmOfTheRain-Byte]

When I execute the visualization tool file DataViewer_V2.py
the following error occurs?

Traceback (most recent call last):
File "/home/SeeingThroughFog/tools/DatasetViewer/DataViewer_V2.py", line 830, in closeEvent
self.save_current_index()
File "/home/SeeingThroughFog/tools/DatasetViewer/DataViewer_V2.py", line 836, in save_current_index
with open(index_file, 'w') as outfile:
FileNotFoundError: [Errno 2] No such file or directory: ".current_index_Namespace(path_timestamps='tools/DatasetViewer/timestamps.json', root_path='STF/SeeingThroughFogCompressedExtracted', username='admin', view_only=False)"
and in the def main(name):
name was printed as fellows：
Namespace(path_timestamps='tools/DatasetViewer/timestamps.json', root_path='STF/SeeingThroughFogCompressedExtracted', username='admin', view_only=False)

would you tell me how to fix this issue?
Thanks very much