In BlazeMeter-->Mock Services, try to import MAR files from DevTest VSE server and got stuck.
Proxy blocking calls to localhost caused the issue.
Release : SAAS
Component : BlazeMeter Mock Services
Configuring the proxy to bypass localhost resolved the issue.
From the logs found that the crane received the VSE import command and was relayed to the Bridge. However, the Rest API is not getting invoked at the bridge level and think the proxy could be blocking calls to localhost. Recommended to configure the HTTP proxy to unblock calls to localhost should resolve the issue.
Creating Mock Services: https://guide.blazemeter.com/hc/en-us/articles/360001811558-Creating-a-Mock-Service-Creating-a-Mock-Service#h_b1df3e7c-0527-47c4-8bac-4661f8741fe6