Cron problems

(I removed the access token, but it is there, and it works as manual action works).

I’m getting this cron error message:

<br />
<b>Warning</b>: session_name(): Cannot change session name when headers already sent in <b>/home/centralcinema/public_html/wp-content/plugins/theatre/functions/wpt_cart.php</b> on line <b>22</b><br />

OK, now I have resolved cron on the server, the scripts are running ok, except this warning which it generates, every time:

<br />
<b>Warning</b>: session_name(): Cannot change session name when headers already sent in <b>/home/centralcinema/public_html/wp-content/plugins/theatre/functions/wpt_cart.php</b> on line <b>22</b><br />

(Inlcuding the veezi settings page, which now gives times that make sense).

Hi Miriam,

How were you able to fix this? If think there is a conflict with another plugin that has added additional cron schedules.

The error message is actually a warning. It isn’t harmful ,but I will try to fix in a future release of the plugin.

Same error, this time while bulk deleting.

I am trying to move things into the trash, select 4 items, Bulk Action > Move to trash.

This causes a white screen and
“There has been a critical error on your website – Learn more about debugging in WordPress.”

Ive turner on the debugging log, which records this:

[28-Aug-2020 05:37:03 UTC] PHP Warning: session_name(): Cannot change session name when headers already sent in /home/centralcinema/public_html/wp-content/plugins/theatre/functions/wpt_cart.php on line 22
[28-Aug-2020 05:37:19 UTC] PHP Deprecated: contextual_help is deprecated since version 3.3.0! Use get_current_screen()->add_help_tab(), get_current_screen()->remove_help_tab() instead. in /home/centralcinema/public_html/wp-includes/functions.php on line 5148
[28-Aug-2020 05:38:03 UTC] PHP Warning: session_name(): Cannot change session name when headers already sent in /home/centralcinema/public_html/wp-content/plugins/theatre/functions/wpt_cart.php on line 22

WordPress Version: 5.5
PHP Version: 7.4.9
MySQL Version: 5.7.31
Apache Version: This information is not available.

Theater (0.17)
Veezi for Theater (1.2)

I can bulk delete 3 items.
4 items gives the critical error

Take that back. Sometimes it will do three.
When it fails, it has done one or two.
Just now, it has refused to move 3 events twice in a row. Moved one each time.