Exception: Instagram token is required

[MaluNoPeleke]

Since a few days I always get the following error:

Exception: Instagram token is required. in /var/www/virtual/peleke7/peleke.de/site/plugins/kirby3-instagram/fetch.php:24
Stack trace:
#0 {main}
Exception: Instagram token is required. in file /var/www/virtual/peleke7/peleke.de/site/plugins/kirby3-instagram/fetch.php on line 24
Stack trace:

1. Exception->() /var/www/virtual/peleke7/peleke.de/site/plugins/kirby3-instagram/fetch.php:24

It worked before and I haven't changed much. Clicking on the link to renew the access works without a problem.
Why is that?