When adding a block to an H5P activity (moodle core, not third-party plugin), an error appears.

Steps to reproduce:

1. Create a course with a Moodle h5p activity within it.
2. Open the activity.
3. Click add block, select any block.
4. The following error appears:

 
Debug info:
Error code: generalexceptionmessage
Stack trace: * line 321 of /mod/h5pactivity/lib.php: TypeError thrown

• line 2140 of /lib/blocklib.php: call to h5pactivity_page_type_list()
• line 864 of /lib/blocklib.php: call to generate_page_type_patterns()
• line 1482 of /lib/blocklib.php: call to block_manager->add_block_at_end_of_default_region()
• line 1408 of /lib/blocklib.php: call to block_manager->process_url_add()
• line 1500 of /lib/pagelib.php: call to block_manager->process_url_actions()
• line 985 of /lib/pagelib.php: call to moodle_page->starting_output()
• line 1299 of /lib/outputrenderers.php: call to moodle_page->set_state()
• line 1945 of /lib/setuplib.php: call to core_renderer->header()
• line 70 of /mod/h5pactivity/view.php: call to bootstrap_renderer->__call()