PHP errors running 7.3

WordPress 5.3. Only plugins activated are Cosmic Campaigns and Cosmic Blocks. Debug mode activated.

( ! ) Warning: Invalid argument supplied for foreach() in /var/www/html/wp-includes/class-wp-post-type.php on line 526
Call Stack
#	Time	Memory	Function	Location
1	0.0059	526776	{main}( )	.../plugins.php:0
2	0.0074	569888	require_once( '/var/www/html/wp-admin/admin.php' )	.../plugins.php:10
3	0.0089	584544	require_once( '/var/www/html/wp-load.php' )	.../admin.php:34
4	0.0112	595736	require_once( '/var/www/html/wp-config.php' )	.../wp-load.php:37
5	0.0130	686696	require_once( '/var/www/html/wp-settings.php' )	.../wp-config.php:82
6	0.5709	25815664	do_action( )	.../wp-settings.php:523
7	0.5709	25816040	WP_Hook->do_action( )	.../plugin.php:478
8	0.5709	25816040	WP_Hook->apply_filters( )	.../class-wp-hook.php:312
9	0.6828	26446984	CosmicCampaigns_ContactCustomposttype->init( )	.../class-wp-hook.php:288
10	0.6837	26451128	register_post_type( )	.../class.contact.customposttype.php:33
11	0.6870	26456112	WP_Post_Type->add_supports( )	.../post.php:1421

( ! ) Warning: Invalid argument supplied for foreach() in /var/www/html/wp-includes/class-wp-post-type.php on line 526
Call Stack
#	Time	Memory	Function	Location
1	0.0059	526776	{main}( )	.../plugins.php:0
2	0.0074	569888	require_once( '/var/www/html/wp-admin/admin.php' )	.../plugins.php:10
3	0.0089	584544	require_once( '/var/www/html/wp-load.php' )	.../admin.php:34
4	0.0112	595736	require_once( '/var/www/html/wp-config.php' )	.../wp-load.php:37
5	0.0130	686696	require_once( '/var/www/html/wp-settings.php' )	.../wp-config.php:82
6	0.5709	25815664	do_action( )	.../wp-settings.php:523
7	0.5709	25816040	WP_Hook->do_action( )	.../plugin.php:478
8	0.5709	25816040	WP_Hook->apply_filters( )	.../class-wp-hook.php:312
9	0.7408	26504504	CosmicCampaigns_TodoCustomposttype->init( )	.../class-wp-hook.php:288
10	0.7416	26508136	register_post_type( )	.../class.todo.customposttype.php:35
11	0.7429	26513120	WP_Post_Type->add_supports( )	.../post.php:1421

( ! ) Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/wp-includes/class-wp-post-type.php:526) in /var/www/html/wp-includes/functions.php on line 5946
Call Stack
#	Time	Memory	Function	Location
1	0.0059	526776	{main}( )	.../plugins.php:0
2	0.0074	569888	require_once( '/var/www/html/wp-admin/admin.php' )	.../plugins.php:10
3	0.9094	30200648	do_action( )	.../admin.php:170
4	0.9094	30201024	WP_Hook->do_action( )	.../plugin.php:478
5	0.9094	30201024	WP_Hook->apply_filters( )	.../class-wp-hook.php:312
6	0.9130	30219616	send_frame_options_header( )	.../class-wp-hook.php:286
7	0.9130	30219616	header ( )	.../functions.php:5946

( ! ) Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/wp-includes/class-wp-post-type.php:526) in /var/www/html/wp-admin/includes/misc.php on line 1252
Call Stack
#	Time	Memory	Function	Location
1	0.0059	526776	{main}( )	.../plugins.php:0
2	0.0074	569888	require_once( '/var/www/html/wp-admin/admin.php' )	.../plugins.php:10
3	0.9094	30200648	do_action( )	.../admin.php:170
4	0.9094	30201024	WP_Hook->do_action( )	.../plugin.php:478
5	0.9094	30201024	WP_Hook->apply_filters( )	.../class-wp-hook.php:312
6	0.9507	30509584	wp_admin_headers( )	.../class-wp-hook.php:288
7	0.9507	30509904	header ( )	.../misc.php:1252

( ! ) Warning: Cannot modify header information - headers already sent by (output started at /var/www/html/wp-includes/class-wp-post-type.php:526) in /var/www/html/wp-admin/admin-header.php on line 9
Call Stack
#	Time	Memory	Function	Location
1	0.0059	526776	{main}( )	.../plugins.php:0
2	1.1329	30675728	require_once( '/var/www/html/wp-admin/admin-header.php' )	.../plugins.php:481
3	1.1336	30675792	header ( )	.../admin-header.php:9

Best,

Anthony