No valid data file found, script ends

PWS_graph_xx.php(33) loaded  =>PWS_graph_xx.php|01|2021-05-15|
PWS_graph_xx.php (37) include_once  =>./PWS_livedata.php
PWS_livedata.php (22) version =>PWS_livedata.php|01|2022-03-28|
PWS_livedata.php (25) include_once =>PWS_settings.php
PWS_settings.php (28) version =>PWS_settings.php|01|2021-12-04|
PWS_settings.php (32) include =>/membri/meteomonterosi/_my_settings/settings.php
PWS_settings.php (176) $defaultlanguage=it-it $used_lang =it-it $locale_wu=it-IT $lang_locale=it $lang_file=languages/lang_it.txt
PWS_settings.php (284) $units_used =metric $windunit=km/h $tempunit=C $rainunit=mm $pressureunit=hPa $distanceunit=km $wu_unit=m
PWS_livedata.php (29) include_once =>PWS_shared.php
PWS_shared.php (21) version =>PWS_shared.php|01|2021-12-04|
PWS_livedata.php (39) $itsday =1
PWS_livedata.php (2009) include_once =>PWS_snow.php
PWS_snow.php (45) version =>PWS_snow.php|01|2021-02-08|
PWS_snow.php (49) include_once =>PWS_settings.php
PWS_snow.php (52) include_once  =>PWS_shared.php
PWS_snow.php (88) Current ./jsondata/snow.arr up-to-date
PWS_graph_xx.php (76) type set to wind from request wind
PWS_graph_xx.php (166) loading  =>./chartswudata/IMONTE383YMD.txt
PWS_graph_xx.php (193)Line-names contains {"success":false,"error":"Data could not be loaded from WU
437