Please specify can you reproduce this issue on the DEMO.
What is the version of Oxwall software you are using?
Did you try to deactivate all the third-party plugins?
Have you tested you site using the Origin default theme ?
Have you enabled the DEBUG mode using this instruction:
https://docs.oxwall.org/plugin-tuts:enable-debug ?
Also, please, check the error.log if there are any errors: /ow_log/error.