I am unable to print the e-invoice or e-way bill along with the sales invoice. How can I resolve this?

To print an e invoice or e way bill along with the sales invoice, you need to follow the below steps:
Ensure that e invoice configuration is done in GST or VAT.
Also, make sure that your QR code print option is enabled in the Sales invoice bill print option, as well as Print E invoice IRN, Ack. No., and Act Date, from Administration then Configuration then Invoice Document Printing, then find your Sales Invoice, whether it is Standard or Advance. If it is Standard, select the sales invoice and enable the option, or if it is Advance, design it in advance format.
Also, make sure the Voucher Series Configuration option generates an e invoice after the saving option is enabled.
After confirming the above option, we have two options to print:
First Option:
Step 1: Open the specific sale invoice voucher for which you want to check e invoice generation.
Step 2: Access the transport option by clicking on Voucher Details.
Step 3: In the Transport window, verify whether the following information is displayed:
INR number
Ack No.
Ack date
QR code 
Step 4: The presence of these details in the transport window confirms the e invoice generation for the respective sale invoice.
After you click on the save option, you will find the option to print the e invoice and e way bill.
After printing the e invoice and e way bill, you can print the sales invoice with the e invoice and e way bill details.
By following these steps, you can easily check and print the e invoice or e way bill along with the sales invoice.
Second Option:
Step 1: Go to the Transactions menu.
Step 2: Under Transactions, locate and select GST Misc. Utilities.
Step 3: Inside GST Misc. Utilities, choose E Way Bill and E Invoice Management.
Step 4: In the next menu, click on Generate Print E Invoice.
Step 5: You will see the option Generate Print E Invoice. Select this option.
Step 6: Choose an e invoice to be generated automatically if that's your preference.
Step 7: In the voucher details section, select the voucher type.
Step 8: Specify the starting date and ending date for the vouchers you want to work with.
Step 9: Click Load List to view the vouchers within the specified date range.
Step 10: Select the sales e invoice for which you want to print the e invoice and e way bill.
then you will find the option to print an e invoice, print an e way bill, and print an invoice. By clicking on this option, you can print an e invoice, an e way bill, and a sales invoice.