I guess your UiPath studio got updated now and may be because of that its getting failed. Please check it once whether studio got updated or not.
If its updated then change version in your BAT file.
And also we can schedule Attended BOTS through UiPath Agent Desktop and its new feature and please check below thread to know more about it.
Anil_G
ashokkarale
jinal.shah
Gautham_Pattabiraman
postwick
chandreshsinh.jadeja
vrdabberu
Ajay_Mishra
sven.wullum1
Vyshnavi_Nalumachu