I have observed the same problem on my Mobile Version of my website (see https://www.TheMountainRLC.org/events) once I upgraded to 4.1.01 Four observations
1. On the mobile version (using Solostream wp-responsive theme) of the website, the dots appear in the calendar day, but Event Descriptions, Feature Images, etc. do not appear for the selected day below the calendar.
2. When attempting to advance to the next month by using the navigation button (e.g., April >>) the mobile site goes into an endless spin and the calendar does not advance.
3. When the endless spin occurs while attempting to advance the month the following errors are thrown
Mar 19, 15:02:25 PHP Warning: in_array() expects parameter 2 to be array, boolean given in /home/jaykiskel1/public_html/wp-content/plugins/the-events-calendar/common/src/Tribe/Admin/Notice/Archive_Slug_Conflict.php on line 49
Mar 19, 15:02:26 PHP Warning: Cannot modify header information – headers already sent by (output started at /home/jaykiskel1/public_html/wp-content/plugins/the-events-calendar/common/src/Tribe/Admin/Notice/Archive_Slug_Conflict.php:49) in /home/jaykiskel1/public_html/wp-content/plugins/the-events-calendar/src/Tribe/Template/Month.php on line 987
4. Finally, the calendar plugin works PERFECTLY on computer based browsers.
This is a great plugin. Hope you can identify a resolution path.
Thanks much, Jay