The Expiration OOUI widget is missing from Special:Block on all beta wikis: https://en.wikisource.beta.wmflabs.org/wiki/Special:Block
In the console:
Uncaught Error: Circular dependency! mw-input-wpExpiry at Object.OO.ui.Element.static.unsafeInfuse (load.php?debug=false&lang=en&modules=ext.uls.compactlinks%2Ceventlogger%2Cinterface%2Cpreferences|jquery%2Cmoment%2Coojs-ui-core%2Coojs-ui-widgets|jquery.lengthLimit|mediawiki.htmlform%2Cwidgets|mediawiki.htmlform.ooui|mediawiki.special.block|mediawiki.widgets.DateInputWidget%2CNamespacesMultiselectWidget%2CSelectWithInputWidget%2CTitlesMultiselectWidget%2CUserInputWidget%2Cdatetime%2Cexpiry|mediawiki.widgets.DateInputWidget.styles|oojs-ui.styles.icons-editing-advanced%2Cicons-editing-core%2Cicons-moderation%2Cicons-movement|skins.vector.js&skin=vector&version=0yyp97s:269) at Object.OO.ui.Element.static.infuse (load.php?debug=false&lang=en&modules=ext.uls.compactlinks%2Ceventlogger%2Cinterface%2Cpreferences|jquery%2Cmoment%2Coojs-ui-core%2Coojs-ui-widgets|jquery.lengthLimit|mediawiki.htmlform%2Cwidgets|mediawiki.htmlform.ooui|mediawiki.special.block|mediawiki.widgets.DateInputWidget%2CNamespacesMultiselectWidget%2CSelectWithInputWidget%2CTitlesMultiselectWidget%2CUserInputWidget%2Cdatetime%2Cexpiry|mediawiki.widgets.DateInputWidget.styles|oojs-ui.styles.icons-editing-advanced%2Cicons-editing-core%2Cicons-moderation%2Cicons-movement|skins.vector.js&skin=vector&version=0yyp97s:268) at Object.OO.ui.infuse (load.php?debug=false&lang=en&modules=ext.uls.compactlinks%2Ceventlogger%2Cinterface%2Cpreferences|jquery%2Cmoment%2Coojs-ui-core%2Coojs-ui-widgets|jquery.lengthLimit|mediawiki.htmlform%2Cwidgets|mediawiki.htmlform.ooui|mediawiki.special.block|mediawiki.widgets.DateInputWidget%2CNamespacesMultiselectWidget%2CSelectWithInputWidget%2CTitlesMultiselectWidget%2CUserInputWidget%2Cdatetime%2Cexpiry|mediawiki.widgets.DateInputWidget.styles|oojs-ui.styles.icons-editing-advanced%2Cicons-editing-core%2Cicons-moderation%2Cicons-movement|skins.vector.js&skin=vector&version=0yyp97s:264) at infuseIfExists (load.php?debug=false&lang=en&modules=ext.uls.compactlinks%2Ceventlogger%2Cinterface%2Cpreferences|jquery%2Cmoment%2Coojs-ui-core%2Coojs-ui-widgets|jquery.lengthLimit|mediawiki.htmlform%2Cwidgets|mediawiki.htmlform.ooui|mediawiki.special.block|mediawiki.widgets.DateInputWidget%2CNamespacesMultiselectWidget%2CSelectWithInputWidget%2CTitlesMultiselectWidget%2CUserInputWidget%2Cdatetime%2Cexpiry|mediawiki.widgets.DateInputWidget.styles|oojs-ui.styles.icons-editing-advanced%2Cicons-editing-core%2Cicons-moderation%2Cicons-movement|skins.vector.js&skin=vector&version=0yyp97s:537) at HTMLDocument.<anonymous> (load.php?debug=false&lang=en&modules=ext.uls.compactlinks%2Ceventlogger%2Cinterface%2Cpreferences|jquery%2Cmoment%2Coojs-ui-core%2Coojs-ui-widgets|jquery.lengthLimit|mediawiki.htmlform%2Cwidgets|mediawiki.htmlform.ooui|mediawiki.special.block|mediawiki.widgets.DateInputWidget%2CNamespacesMultiselectWidget%2CSelectWithInputWidget%2CTitlesMultiselectWidget%2CUserInputWidget%2Cdatetime%2Cexpiry|mediawiki.widgets.DateInputWidget.styles|oojs-ui.styles.icons-editing-advanced%2Cicons-editing-core%2Cicons-moderation%2Cicons-movement|skins.vector.js&skin=vector&version=0yyp97s:537) at mightThrow (load.php?debug=false&lang=en&modules=ext.uls.compactlinks%2Ceventlogger%2Cinterface%2Cpreferences|jquery%2Cmoment%2Coojs-ui-core%2Coojs-ui-widgets|jquery.lengthLimit|mediawiki.htmlform%2Cwidgets|mediawiki.htmlform.ooui|mediawiki.special.block|mediawiki.widgets.DateInputWidget%2CNamespacesMultiselectWidget%2CSelectWithInputWidget%2CTitlesMultiselectWidget%2CUserInputWidget%2Cdatetime%2Cexpiry|mediawiki.widgets.DateInputWidget.styles|oojs-ui.styles.icons-editing-advanced%2Cicons-editing-core%2Cicons-moderation%2Cicons-movement|skins.vector.js&skin=vector&version=0yyp97s:69) at process (load.php?debug=false&lang=en&modules=ext.uls.compactlinks%2Ceventlogger%2Cinterface%2Cpreferences|jquery%2Cmoment%2Coojs-ui-core%2Coojs-ui-widgets|jquery.lengthLimit|mediawiki.htmlform%2Cwidgets|mediawiki.htmlform.ooui|mediawiki.special.block|mediawiki.widgets.DateInputWidget%2CNamespacesMultiselectWidget%2CSelectWithInputWidget%2CTitlesMultiselectWidget%2CUserInputWidget%2Cdatetime%2Cexpiry|mediawiki.widgets.DateInputWidget.styles|oojs-ui.styles.icons-editing-advanced%2Cicons-editing-core%2Cicons-moderation%2Cicons-movement|skins.vector.js&skin=vector&version=0yyp97s:70)