I have a website hosted on wordpress that provided details of recruitment and jobs, recently i have migrated from http to https. I have made sure to do all the things properly. But a few days later if am seeing an unexpected error.

After visiting two articles in the website, the third article is showing the below error

Warning: explode() expects parameter 2 to be string, array given in /home/z4lnpdx76r16/public_html/govtlatestupdates.in/wp-includes/class-wp-hook.php on line 521

Warning: explode() expects parameter 2 to be string, array given in /home/z4lnpdx76r16/public_html/govtlatestupdates.in/wp-includes/class-wp-hook.php on line 521

and Instead of the content different symbols are appearing.

Please provide me a solution