Prestashop 1.7.7.1 - Modification of import module and HTTP/2 error

We have programmed an automatic feed for loading products. When running it manually everything works perfectly. When we run the Cron of the same feed in Plesk (https://.......) it works normally (200) but the file is not updated. If we run the Cron using the command (curl "https://.....) we get this error CRON execution failed. Error: 0 HTTP/2 stream 0 was not closed cleanly: PROTOCOL_ERROR (err 1) This is rather strange, since the server has the "curl" correction to force towards HTTP/1. Moreover, it is the only module that seems to have this problem. Moreover, two changes have to be made on the same module: 1) insert an editable "box" before the REFERENCE codes. 2) Only products with EAN should be imported. We are looking for an immediate solution within 24-48 hours. Please reply EXCLUSIVELY if you know Prestashop and can work immediately. Remuneration will be paid ONLY at the end of the job.