WordPress customizer displays blank page

WordPress customizer does not work properly. It displays a blank page and the “Widget” tab does not work.
Please find below the list of tests that i run:

1-the same behavior on customized and standard theme.
2-the problem faced on Firefox and works under Chrome.
3-updating all plugins and themes don’t fix the issue.
4-deactivate all plugins does not fix the issue.
5-applying what is suggested on
https://www.mhthemes.com/support/theme-customizer-not-working/
6-increase the memory limit.

System configuration
Wordpress 4.7.4
Firefox 53.0 (64-bit) Mozilla Firefox for Ubuntu canonical-1.0

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