My PHP is PHP Version 7.1.10. I'm testing this Moodle instances and plugins on a local Windows installation. Silly me. should have turned on debugging at once. Here's the listing - apparently looping through the presets does not work correctly, and the drop-down form is not printed, so I can't save the settings etc.
Warning: Illegal string offset 'cosmo' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'cyborg' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'darkly' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'default' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'flatly' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'journal' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'litera' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'lumen' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'lux' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'materia' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'minty' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'pulse' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'sandstone' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'simplex' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'sketchy' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'slate' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'solar' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'spacelab' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'superhero' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'united' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: Illegal string offset 'yeti' in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 40
Warning: natsort() expects parameter 1 to be array, string given in D:\Moodle\server\moodle\theme\handlebar\settings\presets_settings.php on line 52
Warning: Illegal string offset 'cerulean' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'cosmo' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'cyborg' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'darkly' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'default' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'flatly' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'journal' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'litera' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'lumen' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'lux' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'materia' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'minty' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'pulse' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'sandstone' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'simplex' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'sketchy' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'slate' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'solar' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'spacelab' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'superhero' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'united' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: Illegal string offset 'yeti' in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 40
Warning: natsort() expects parameter 1 to be array, string given in D:\Moodle\server\moodle\theme\waxed\settings\presets_settings.php on line 52
Thanks,
Przemek