It is up to every forum admin/owner to ensure their website is running error free.
The errors should be fixed starting from the top & then recheck the page/container. Usually one or more errors (shown at the top of the console list) will have a cascade effect causing errors that follow.
Aside from that tidbit of info, you can disable your blocks in the admin section.
Other than testing stuff, there's no point showing blocks in admin.
I disabled them in admin for you: Admin -> Simple Portal -> Configuration -> Block Settings -> Hide Blocks in Forum Areas -> Admin (checked & saved)