ERROR by import attachments to Jira server issues via REST API

[Alessandro Lazzarini]

Hi all, I'm trying to use this guide to import many attachments in several:

https://confluence.atlassian.com/jirakb/bulk-import-attachments-to-jira-server-issues-via-rest-api-729750741.html

when i start the command :

./jira_attachments_import.sh <user account> <password> ABC https://<project_name>.atlassian.net | tee Jira-IMPORT.txt

unfortunately I get the following errors :

I followed the procedure step by step and also tried to change the structure of the Directories where the files to be attached are contained, inserting the Directory 10000 and then I also tried 20000. Of course I have replaced the letters ABC in the command with the KEY of my project in this case TIK.

The script seems to work, because it tries to load the data, but apparently it can not communicate with the server.
I don't understand where the problem could be.
I'm performing this operation in a Linux PC (as written in the guide), The project has just started and we are less than 10 users, so we are using the Free version of Jira. As described in the guide, I have inserted my API-Token instead of the password.

Thanks in advance for your help

[Alessandro Lazzarini · Accepted solution]

I solved it myself.
I went to the instructions on how to use Atlassian's Rest API

https://confluence.atlassian.com/jirakb/how-to-add-an-attachment-to-a-jira-issue-using-rest-api-699957734.html

and created my own script with the command to upload files as attachments.