Gsa compile failed due to yarn

hi i am trying to build gsa but due to yarn error its not working .my network connection is fine . i am not using any proxy . firstly i try to use npm then install yarn by npm same error then i install yarn and node js seperatly same error . any solution ?? i am using latest yarn packages i tried to increase timeout too but no result
[ 5%] Install gsa js dependencies
yarn install v1.22.5
[1/5] Validating package.json…
[2/5] Resolving packages…
[3/5] Fetching packages…
[-----------------------------------------------------------------------------------------------] 0/1962

info There appears to be trouble with your network connection. Retrying…
info There appears to be trouble with your network connection. Retrying…
info There appears to be trouble with your network connection. Retrying…
info There appears to be trouble with your network connection. Retrying…
error An unexpected error occurred: “https://registry.yarnpkg.com/@babel/core/-/core-7.10.4.tgz: ETIMEDOUT”.
info If you think this is a bug, please open a bug report with the information provided in “/opt/gvm/src/gsa-20.8.0/gsa/yarn-error.log”.
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

Looks to me that your environment has problems accessing yarnpkg.com which is most likely a networking problem (DNS, firewall, routing, …) not related to GVM / the GSE.