You can use external online tool to find out where is broken link.
There are 2 online tool available for free
- 1. https://www.deadlinkchecker.com/ -> faster
- 2. https://www.brokenlinkcheck.com -> slower
put your root url e.q. https://dedetoknotes.blogspot.com.
Put your root url e.q. https://dedetoknotes.blogspot.com, and click search. Fill captcha code is required.
After waiting for some times, the web will show you which link are broken.
In other browser, sign in into your blogspot. Find a key workd which the link was broken.
For example link reported broken was https://github.com/dedetok/fail2ban-to-mysql/blob/gh-pages/mlocaldb.conf. You can find in blogspot search "fail2ban to mysql".
Repeat to search and fix manually the broken link. You can ask the web tool to researching broken link.
NOTE:
Do not put any active url link into your page! Just inform the url, not linked it.