求助，编译引导添加扩展驱动时提示curl: (35) OpenSSL SSL_connec...

添加扩展驱动的时候提示这个，，是什么原因。。架上*子也是这样。。系统是20.04.4
root@ubuntu-Virtual-Machine:/home/ubuntu/redpill-tool-chain-master# ./redpill_tool_chain.sh add https://raw.githubusercontent.co ... 68/rpext-index.json
Downloading
curl: (35) OpenSSL SSL_connect: 连接被对方重设 in connection to raw.githubusercontent.com:443  

http://www.gebi1.com/thread-300201-1-3.html 操作步骤按照这个帖子教程来操作的

Failed to download index file for thethorgroup.boot-wait extension from https://raw.githubusercontent.co ... it/rpext-index.json
[-] 11 extensions failed to update
[#] Checking runtime for required tools... [OK]
[#] Updating ds918p_42218 platforms extensions...
[#] Downloading remote file https://raw.githubusercontent.co ... s/ds918p_42218.json to /opt/redpill-load/custom/extensions/_ext_new_rcp.tmp_json
##O=#   #                                                                                                                                       
curl: (35) OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to raw.githubusercontent.com:443
[!] Failed to download https://raw.githubusercontent.co ... s/ds918p_42218.json to /opt/redpill-load/custom/extensions/_ext_new_rcp.tmp_json



*** Process will exit ***

[-] Failed to update recipe for pocopico.alx extension for platform ds918p_42218. The script will terminate as you do not
[-] have previously downloaded recipe which can be used if download fails. Try again later. If problem
[-] persists contact the extension packer for support (displayed below)
[#] ========================================== pocopico.alx ==========================================
[#] Extension name: alx
[#] Description: Adds Qualcomm Atheros(R) AR816x/AR817x PCI-E Ethernet Network Driver Support
[#] To get help visit: <todo>
[#] Extension preparer/packer: https://github.com/pocopico/rp-ext/tree/main/alx
[#] Software author: https://github.com/pocopico
[#] Update URL: https://raw.githubusercontent.co ... lx/rpext-index.json
[#] Platforms supported: ds1621p_42218 ds3617xs_25556u2 ds3622xsp_42218 ds918p_42218 ds918p_41890 ds3615xs_42218 ds3615xs_25556 ds3615xs_41222 ds918p_25556 ds3615xs_25556u2 dva3221_42218 ds3617xs_42218 ds3617xs_25556 ds3617xs_42218u2
[#] =======================================================================================

[!] Cannot continue due to previous errors (see above)

*** Process will exit ***
[!] Failed to update all extensions for ds918p_42218 platform - see errors above

*** Process will exit ***


这些都是什么问题。。怎么解决

重新add几次就可以了。就是网络不通。