Multiple error notices on "All Projects" page

As the title says, there are multiple error notices on the “All Projects” page. Everything seems to be working fine with the plugin, but I wanted to notify the plugin author. Here are the errors as they appear in my dashboard:

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/response-bean.php on line 32

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/response-bean.php on line 14

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/response-bean.php on line 40

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/response-bean.php on line 22

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 40

Notice: Undefined index: filter_pname in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 41

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 45

Notice: Undefined index: filter_pcategory in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 46

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 50

Notice: Undefined index: filter_pstatus in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 51

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 40

Notice: Undefined index: filter_pname in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 41

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 45

Notice: Undefined index: filter_pcategory in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 46

Notice: A session had already been started - ignoring session_start() in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 50

Notice: Undefined index: filter_pstatus in /home/content/86/7499786/html/wp-content/plugins/portfolio-manager-powered-by-behance/includes/project-filter-bean.php on line 51

I would assume these are related to a plugin conflict. Let me know if you have any questions. Thanks!

https://ww.wp.xz.cn/plugins/portfolio-manager-powered-by-behance/