If you are unable to print e invoice from BUSY,you need to check these things:
Step 1:Go to the Administrtaion menu,
Step 2:Click configuration,
Step 3:Click Features and Options,
Step 4:Click GST/VAT Tab,click GSP Configuration Tab,Validate GSP is properly working or not,If not validated,
Step 5:Check your internet should be properly working on your system,
Step 6:Check antivirus on your system exclude BUSY from antivirus.
Step 7:Check window Defender on your system Allow BUSY from there,
Step 8:If any PDF file on your system right click on it,click properties,click changes,here you need to set as default Google Chrome,then print e invoice again from BUSY,it will be Printed.