I integrate the block-content-promo-4 into my website. But when I tried to enter my email into the join waitlist button, its always loading. And I get an error log like this:
[31-Aug-2021 21:58:55 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 21:58:55 America/New_York] PHP Notice: Undefined offset: 1 in /home/koinympu/public_html/include/subscribe.php on line 14
[31-Aug-2021 21:59:25 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 21:59:25 America/New_York] PHP Notice: Undefined offset: 1 in /home/koinympu/public_html/include/subscribe.php on line 14
[31-Aug-2021 22:01:46 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 22:01:46 America/New_York] PHP Notice: Undefined offset: 1 in /home/koinympu/public_html/include/subscribe.php on line 14
[31-Aug-2021 22:02:01 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 22:02:01 America/New_York] PHP Notice: Undefined offset: 1 in /home/koinympu/public_html/include/subscribe.php on line 14
[31-Aug-2021 22:02:05 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 22:02:05 America/New_York] PHP Notice: Undefined offset: 1 in /home/koinympu/public_html/include/subscribe.php on line 14
[31-Aug-2021 22:03:06 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 22:03:06 America/New_York] PHP Notice: Undefined offset: 1 in /home/koinympu/public_html/include/subscribe.php on line 14
[31-Aug-2021 22:04:34 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 22:04:34 America/New_York] PHP Notice: Undefined offset: 1 in /home/koinympu/public_html/include/subscribe.php on line 14
[31-Aug-2021 22:08:09 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 22:08:09 America/New_York] PHP Notice: Undefined offset: 1 in /home/koinympu/public_html/include/subscribe.php on line 14
[31-Aug-2021 22:41:34 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 22:41:34 America/New_York] PHP Notice: Undefined offset: 1 in /home/koinympu/public_html/include/subscribe.php on line 14
[31-Aug-2021 22:51:48 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 23:55:30 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
[31-Aug-2021 23:58:05 America/New_York] PHP Notice: Undefined index: widget-subscribe-form-email in /home/koinympu/public_html/include/subscribe.php on line 10
I don't know how to do PHP but I tried to search online and got no result.