We tried to run Signal Desktop Client locally (on a Linux machine) and followed the instruction Development Guideline and performed Linux Setup and then All Platform Basic Setup

Then we tried Setting up standalone as by default the running the app is connected to the staging server and we need to register. Now while we entered a valid mobile number (full no. with country code : (Bangladesh)+880183331....) and tried to send a verification SMS the desktop client window redirected us to a Captcha page in the chrome window where we had to reload first to actually see the challenge. Then after completing the challenge, it marks as solved and nothing happens, no verification code to mobile so can't progress in the desktop client window. can't open the development client though it opened the production client that was installed in the machine and later we uninstalled the production version to forcefully open the development client but nothing happened.

We even tried The staging environment and again got stuck in Send SMS part which redirected us to the Chrome Captcha page and does literally nothing.

Is mobile number verification for Signal Staging Server blocked in Bangladesh or there can be another issue that can be solved easily? We really got frustrated simply to run the project which got so much love from the open-source community.