by Phil Everist.
I have also just noted multiple debugging messages displaying before the page content when switching to edit mode which look related as well as a set of grey editing icons displaying instead of the coloured ones i usually see (see attached file).
The first of the debugging errors states:
The block attendance does not define the standard capability block/attendance:addinstance
- line 598 of \blocks\moodleblock.class.php: call to debugging()
- line 576 of \blocks\moodleblock.class.php: call to block_base->has_add_block_capability()
- line 236 of \lib\blocklib.php: call to block_base->user_can_addto()
- line 1864 of \lib\blocklib.php: call to block_manager->get_addable_blocks()
- line 1007 of \lib\blocklib.php: call to block_add_block_ui()
- line 353 of \lib\blocklib.php: call to block_manager->ensure_content_created()
- line 6 of \theme\south\layout\general.php: call to block_manager->region_has_content()
- line 804 of \lib\outputrenderers.php: call to include()
- line 734 of \lib\outputrenderers.php: call to core_renderer->render_page_layout()
- line 240 of \course\view.php: call to core_renderer->header()