Hi, Musa S.
Welcome to Microsoft Community.
Thank you for your contribution to Edge browser extensions! The programs you uploaded can help many users.
We understand that you encountered network problems when uploading extensions for Edge browser. This may be due to a connection problem with the server where Edge uploads extensions, so you will get related errors.
Regarding this issue, since the developer mode is beyond the support scope of the Microsoft community, it is recommended that you report this issue to the developer forum. For details, please refer to:
Contact Microsoft Edge extensions support - Microsoft Edge Developer documentation | Microsoft Learn
Thank you again for your contribution to Edge browser! If you have any questions, please feel free to contact us.
Best Regards
Nicholas.Z - MSFT | Microsoft Community Support Specialist