Install Backendless standalone on Linux

How are you?

I also tried to install backendless standalone on linux
At the end I got this error


Warning: Problem running post-install step. Installation may not complete correctly
Unknown error while running /home/myuser/backendless-3.0.0-16/common/bin/curl -v -# --stderr
/home/myuser/backendless-3.0.0-16/apps/backendless/logs/flightcontrol_response.log -X GET 127.0.0.1:7737 -o
/home/myuser/backendless-3.0.0-16/apps/backendless/logs/flightcontrol_response.log

I attach log contents also.

[Thread-1] INFO spark.webserver.SparkServer - == Spark has ignited …

[Thread-1] INFO spark.webserver.SparkServer - >> Listening on
0.0.0.0:7737

[Thread-1] INFO org.eclipse.jetty.server.Server - jetty-9.0.z-SNAPSHOT

[Thread-1] INFO org.eclipse.jetty.server.ServerConnector - Started
ServerConnector@1eb00064{HTTP/1.1}{0.0.0.0:7737}

I don’t know why this happens.
Please help me.
Thank you for your trying.