how to solve this problem--403 and 503 errors

[wangyd-hub]

When i run command--./run_tests.sh ,it made a mistake. EOS files error were displayed on the screen. After that, I deleted the command to test the EOS files and it can run it. Then I ran the next command--./run_explorer_tests.sh and it showed 403 and 503 errors. So, I want to know how to solve this problem.Thank you !