Tasks fails to get a full access on another Nextcloud instance than e

On /e/OS 1.4 (Q stable, on a Samsung S7 aka herolte), I had two instances of Nextcloud, and I was using both without issue:

• the first provided by ecloud.global
• the second, provided by zaclys.com (Nextcloud 23.0.5)

Until I upgrade to 1.5-beta, and then 1.5-rc, I was able to use both instance without any problem.

Since my upgrade (OTA),

• For ecloud.global, I experiment no problem
• For the other (Zaclys),
  • I can create or delete a task
  • I can't see the details of task : it appears as if it was empty
  • If I try to edit a task, I get the error message "Could not load Model", and I can't edit anything
• I I try to check Menu > Shown lists ("Listes montrées" in French), Tasks crash immediately.

Device: Samsung S7 aka SM-G930F aka herolte OS: /e/OS 1.5-rc20221013226135 Tasks version:1.2.3-76-gca2dc61