latest pillow module has changed syntax. brother_ql isn't updated, but there is a pull request (#143) to fix it. Change to that pull request for brother_ql temporarily.

tingox · tingox · commit a077c0ec3769 · 2023-09-03T18:21:39.000+02:00
diff --git a/p2k16-label/requirements.txt b/p2k16-label/requirements.txt
@@ -1,6 +1,7 @@
 pillow
 qrcode
-brother_ql
+#brother_ql
+git+https://github.com/pklaus/brother_ql@refs/pull/143/merge#egg=brother_ql
 paho.mqtt
 #json
 #tempfile
