Issue solved

[tnsgaming]

link=$(curl -s -N http://127.0.0.1:4040/api/tunnels | grep -o '[-0-9a-z]*\.ngrok.io')

Change into this Syntax in these lines - 57, 104, 151, 198, 246, 293, 351, 394, 443, 491, 538, 584, 631, 677, 724, 770, 816, 863, 911, 958, 1004, 1050, 1096, 1143, 1190, 1237, 1285, 1333, 1380, 1426, 1473, 1521, 1567